{"title":"TWSBI Diamond 580","description":"\u003cp data-mce-fragment=\"1\"\u003eThe Diamond 580 is the classic TWSBI pen - the culmination of the line they've been gradually improving for years, and it's \u003cem data-mce-fragment=\"1\"\u003ereally\u003c\/em\u003e good now.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe piston filling mechanism works well and smoothly, and holds plenty of ink. The clear barrel means you can see when you're running low well in advance, so you don't run out of ink unexpectedly. The style is perfectly TWSBI - crystal clear, cut into a facetted pattern that catches the light, giving the pens their name. The steel nibs are reliably good, and the size and shape is nicely comfortable for most people. For a smaller pen, see the \u003ca data-mce-fragment=\"1\" href=\"\/collections\/twsbi-diamond-mini\" data-mce-href=\"https:\/\/www.cultpens.live\/c\/q\/brands\/twsbi\/twsbi-fountain-pens\/twsbi-diamond-mini\"\u003eDiamond Mini\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"twsbi-diamond-580-fountain-pen-clear","title":"TWSBI Diamond 580 Fountain Pen Clear","description":"\u003cp\u003eTWSBI Diamond 580 Fountain Pen Clear. Transparent barrel reveals the filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes: fine, medium, broad, extra-fine, stub 1.1mm and stub 1.5mm.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted.  12.9mm max barrel diameter, grip section tapers down to 9.5mm.  Weighs 28g.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use.  Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Medium","offer_id":43185472995571,"sku":"TW27808-M","price":53.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185473028339,"sku":"TW27808-F","price":53.0,"currency_code":"GBP","in_stock":true},{"title":"Extra-Fine","offer_id":43185473061107,"sku":"TW27808-EF","price":53.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185473093875,"sku":"TW27808-B","price":53.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1","offer_id":43185473126643,"sku":"TW27808-11","price":53.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW27808-ZZZ_TWSBI-Diamond-580-Fountain-Pen-Clear_P1.jpg?v=1663765351"},{"product_id":"twsbi-diamond-580al-fountain-pen","title":"TWSBI Diamond 580AL Fountain Pen","description":"\u003cp\u003eTWSBI Diamond 580AL Fountain Pen. Transparent barrel reveals the aluminium filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eAlong with the aluminium filling mechanism, this AL version features an aluminium grip section to help balance the pen better as well as making it look even more shiny.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a range of nib sizes: fine, medium, broad, extra-fine.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted.  12.9mm max barrel diameter, grip section tapers down to 9.5mm.  Weighs 32g - just a little heavier than the standard model Diamond 580.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use.  Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra-Fine","offer_id":43185474044147,"sku":"TW40438-EF","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185474076915,"sku":"TW40438-F","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":43185474109683,"sku":"TW40438-M","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185474142451,"sku":"TW40438-B","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1","offer_id":43185474175219,"sku":"TW40438-11","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW40438-ZZZ_TWSBI-Diamond-580AL-Fountain-Pen_P1.jpg?v=1663765666"},{"product_id":"twsbi-diamond-580-replacement-nib-unit","title":"TWSBI Diamond 580 Replacement Nib Unit","description":"\u003cp\u003eReplacement nib unit for TWSBI Diamond 580 fountain pens.\u003c\/p\u003e\n\n\u003cp\u003eBoth nib and clear Diamond 580 grip section supplied including metal ring. Also suitable for Diamond 540 pens, just swap out the old grip section.\u003c\/p\u003e\n\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes: fine, medium, broad, extra-fine, stub 1.1mm and stub 1.5mm.\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra-Fine","offer_id":43185474207987,"sku":"TW41644-EF","price":26.5,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185474240755,"sku":"TW41644-F","price":26.5,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":43185474273523,"sku":"TW41644-M","price":26.5,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185474306291,"sku":"TW41644-B","price":26.5,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1","offer_id":43185474339059,"sku":"TW41644-11","price":26.5,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.5","offer_id":43185474371827,"sku":"TW41644-15","price":26.5,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW41644-ZZZ_TWSBI-Diamond-580-Replacement-Nib-Unit_P1.jpg?v=1663765350"},{"product_id":"twsbi-diamond-580alr-fountain-pen-nickel-grey","title":"TWSBI Diamond 580ALR Fountain Pen Nickel Grey","description":"\u003cp\u003eTWSBI Diamond 580AL Fountain Pen in a stunning nickel grey. Transparent barrel reveals the nickel grey anodized aluminium filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eAlong with the nickel grey anodized aluminium filling mechanism, this AL version features an aluminium grip section to help better balance the pen.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a range of nib sizes: extra-fine, fine, medium, broad and stub.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 32g - just a little heavier than the standard model Diamond 580.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eThere are some white marks on the pistons of these pens; this is grease to ensure that the piston action is smooth and reliable.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use.  Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":43185477058803,"sku":"TW62093-EF","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185477091571,"sku":"TW62093-F","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":43185477124339,"sku":"TW62093-M","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185477157107,"sku":"TW62093-B","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1","offer_id":43185477189875,"sku":"TW62093-11","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW62093-ZZZ_TWSBI-Diamond-580AL-Fountain-Pen-Nickel-Grey_P1.jpg?v=1663766519"},{"product_id":"twsbi-diamond-580-fountain-pen-smoke-rose-gold-ii","title":"TWSBI Diamond 580 Fountain Pen Smoke Rose Gold II","description":"\u003cp\u003eTWSBI Diamond 580 Fountain Pen with Smoke Grey cap and barrel end, and Rose Gold trim. Transparent barrel reveals the filling mechanism, a built-in piston-filler with a very smooth action. Polished rose gold trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\u003cp\u003ePolished rose gold plated nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/p\u003e\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted.  12.9mm max barrel diameter, grip section tapers down to 9.5mm.  Weighs 28g.\u003c\/p\u003e\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use.  Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":48234022600947,"sku":"TW72350-EF","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":48234022633715,"sku":"TW72350-F","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":48234022666483,"sku":"TW72350-M","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":48234022568179,"sku":"TW72350-B","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1mm","offer_id":48234022535411,"sku":"TW72350-11","price":95.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW72350-ZZZ_TWSBI-Diamond-580-Fountain-Pen-Smoke-Rose-Gold-II_P1.jpg?v=1663767128"},{"product_id":"twsbi-diamond-580alr-fountain-pen-prussian-blue-limited-edition","title":"TWSBI Diamond 580ALR Fountain Pen Prussian Blue Limited Edition","description":"\u003cp\u003eTWSBI Diamond 580ALR Fountain Pen in a gorgeous limited edition Prussian Blue. Transparent barrel reveals the blue anodized aluminium filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eAlong with the blue anodized aluminium filling mechanism, this ALR version features an aluminium grip section to help better balance the pen.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 32g - just a little heavier than the standard model Diamond 580.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eThere are some white marks on the pistons of these pens; this is grease to ensure that the piston action is smooth and reliable.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use.  Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":43185479516403,"sku":"TW73099-EF","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185479549171,"sku":"TW73099-F","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":43185479581939,"sku":"TW73099-M","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185479614707,"sku":"TW73099-B","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1mm","offer_id":43185479647475,"sku":"TW73099-11","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.5mm","offer_id":43911481164019,"sku":"TW73099-15","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW73099_TWSBI-Diamond-580ALR-Fountain-Pen-Prussian-Blue_P1.jpg?v=1663767165"},{"product_id":"twsbi-diamond-580alr-fountain-pen-navy-blue","title":"TWSBI Diamond 580ALR Fountain Pen Navy Blue","description":"\u003cp\u003eTWSBI Diamond 580ALR Fountain Pen in a gorgeous Navy Blue. Transparent barrel reveals the blue anodized aluminium filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eAlong with the blue anodized aluminium filling mechanism, this ALR version features an aluminium grip section to help better balance the pen.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 32g - just a little heavier than the standard model Diamond 580.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eThere are some white marks on the pistons of these pens; this is grease to ensure that the piston action is smooth and reliable.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use.  Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":43185481515251,"sku":"TW90055-EF","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185481548019,"sku":"TW90055-F","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":43185481580787,"sku":"TW90055-M","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185481613555,"sku":"TW90055-B","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1mm","offer_id":43185481646323,"sku":"TW90055-11","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.5mm","offer_id":43911483687155,"sku":"TW90055-15","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW90055-ZZZ_TWSBI-Diamond-580ALR-Fountain-Pen-Navy-Blue_P1.jpg?v=1663765734"},{"product_id":"twsbi-diamond-580-fountain-pen-white-rose-gold-ii","title":"TWSBI Diamond 580 Fountain Pen White Rose Gold II","description":"\u003cp\u003eTWSBI Diamond 580 Fountain Pen with White cap and barrel end, and Rose Gold trim. Transparent barrel reveals the filling mechanism, a built-in piston-filler with a very smooth action. Polished rose gold trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished rose gold plated nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 28g.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use. Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":48224355483891,"sku":"TW96665-EF","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":48239083192563,"sku":"TW96665-F","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":48239083225331,"sku":"TW96665-M","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":48239083258099,"sku":"TW96665-B","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1mm","offer_id":48239083290867,"sku":"TW96665-11","price":95.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW96665-ZZZ_TWSBI-Diamond-580-Fountain-Pen-White-Rose-Gold-II_P1.jpg?v=1663768619"},{"product_id":"twsbi-diamond-580-fountain-pen-iris","title":"TWSBI Diamond 580 Fountain Pen Iris","description":"\u003cp\u003eTWSBI Diamond 580 Fountain Pen with a beautiful iridescent iris coloured cap band, pocket clip and barrel band. Transparent barrel reveals the filling mechanism, a built-in piston-filler with a very smooth action. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\n\u003cp\u003ePolished iris-tipped nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/p\u003e\n\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 28g.\u003c\/p\u003e\n\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use. Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":43185482989811,"sku":"TW99547-EF","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":43185483022579,"sku":"TW99547-F","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":43185483055347,"sku":"TW99547-M","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":43185483088115,"sku":"TW99547-B","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1","offer_id":43185483120883,"sku":"TW99547-11","price":95.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/products\/TW99547-ZZZ_TWSBI-Diamond-580-Fountain-Pen-Iris_P1.jpg?v=1675093644"},{"product_id":"twsbi-diamond-580alr-fountain-pen-black","title":"TWSBI Diamond 580ALR Fountain Pen Black","description":"\u003cp\u003eTWSBI Diamond 580ALR Fountain Pen in sleek black. Transparent barrel reveals the black aluminium filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/p\u003e\n\u003cp\u003eAlong with the black aluminium filling mechanism, this ALR version features an aluminium grip section to help better balance the pen.\u003c\/p\u003e\n\u003cp\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/p\u003e\n\u003cp\u003ePolished steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/p\u003e\n\u003cp\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 32g - just a little heavier than the standard model Diamond 580.\u003c\/p\u003e\n\u003cp\u003eNote: piston-filler pens cannot use cartridges.\u003c\/p\u003e\n\u003cp\u003eSupplied gift-boxed.\u003c\/p\u003e\n\u003cp\u003eThere are some white marks on the pistons of these pens; this is grease to ensure that the piston action is smooth and reliable.\u003c\/p\u003e\n\u003cp\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use. Disassembly is at your own risk!\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":44199405650163,"sku":"TW00015-EF","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":44199405682931,"sku":"TW00015-F","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":44199405715699,"sku":"TW00015-M","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":44199405748467,"sku":"TW00015-B","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1mm","offer_id":44199405781235,"sku":"TW00015-11","price":70.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/files\/TW00015_P1.jpg?v=1704450791"},{"product_id":"twsbi-diamond-580alr-fountain-pen-caribbean-with-onyx","title":"TWSBI Diamond 580ALR Fountain Pen Caribbean with Onyx","description":"\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eTWSBI Diamond 580ALR Fountain Pen in a bright, refreshing Caribbean blue. Transparent barrel reveals the blue anodized aluminium filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eAlong with the blue anodized aluminium filling mechanism, this ALR version features an aluminium grip section to help better balance the pen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003ePolished onyx-coloured steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 32g - just a little heavier than the standard model Diamond 580.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eNote: piston-filler pens cannot use cartridges.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eSupplied gift-boxed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eThere are some white marks on the pistons of these pens; this is grease to ensure that the piston action is smooth and reliable.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(64, 64, 64);\"\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use. Disassembly is at your own risk!\u003c\/span\u003e\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":46373000642803,"sku":"TW00025-EF","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":46373000675571,"sku":"TW00025-F","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":46373000708339,"sku":"TW00025-M","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":46373000741107,"sku":"TW00025-B","price":80.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1mm","offer_id":46373000773875,"sku":"TW00025-11","price":80.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/files\/TW00025_TWSBI-Diamond-580ALR-Fountain-Pen-Caribbean-With-Onyx.jpg?v=1730455370"},{"product_id":"twsbi-diamond-580-fountain-pen-rbt","title":"TWSBI Diamond 580 Fountain Pen Red Blue Transparent","description":"\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eTWSBI Diamond 580 Fountain Pen Red Blue Transparent. Transparent barrel reveals the filling mechanism, a built-in piston-filler with a very smooth action. Chromed metal trim and pocket clip. TWSBI logo nicely finishes the top of the pen's cap. Rubber o-ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, whilst also ensuring that the cap is firmly attached to the pen when not in use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eDiamond-faceted barrel ensures pen will not roll away if left uncapped on a desk.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003ePolished steel nib engraved with TWSBI logo and branding, available in a wide range of nib sizes: fine, medium, broad, extra-fine, stub 1.1mm and stub 1.5mm.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e141mm long closed, 130mm long open, 176mm long posted. 12.9mm max barrel diameter, grip section tapers down to 9.5mm. Weighs 28g.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eNote: piston-filler pens cannot use cartridges.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eSupplied gift-boxed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eLike all TWSBI fountain pens we stock, this pen can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each pen. However, the disassembly feature is only there for experienced users and is not necessary for normal use. Disassembly is at your own risk!\u003c\/span\u003e\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra-Fine","offer_id":46887358693619,"sku":"TW00031-EF","price":50.0,"currency_code":"GBP","in_stock":true},{"title":"Fine","offer_id":46887358660851,"sku":"TW00031-F","price":50.0,"currency_code":"GBP","in_stock":true},{"title":"Medium","offer_id":46887358628083,"sku":"TW00031-M","price":50.0,"currency_code":"GBP","in_stock":true},{"title":"Broad","offer_id":46887358726387,"sku":"TW00031-B","price":50.0,"currency_code":"GBP","in_stock":true},{"title":"Stub 1.1","offer_id":46887358759155,"sku":"TW00031-11","price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/files\/TW00031-01.jpg?v=1744624916"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/6388\/4787\/collections\/twsbi-diamond-580.jpg?v=1693518468","url":"https:\/\/cultpens.live\/collections\/twsbi-diamond-580.oembed","provider":"Cult Pens","version":"1.0","type":"link"}