{"product_id":"twsbi-diamond-mini-classic-fountain-pen-black","title":"Twsbi Diamond Mini Classic Fountain Pen Black","description":"\u003cp\u003eThe Twsbi Diamond Mini is the baby brother of the Twsbi Diamond, approx 3cm shorter when posted than the standard Diamond. Still holding a respectable 1.17ml of ink this is a fantastic pocket pen.\u003c\/p\u003e\n\u003cp\u003eIt uses a slightly smaller \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e#4 size nib, whereas the regular Diamond 580 uses a larger #5 size.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBeing a piston filler means it has the filing mechanism built into the body of the pen - simply dip the nib into a bottle of ink and turn the screw on the base of the pen and the ink chamber will fill up with ink.\u003c\/p\u003e\n\u003cp\u003eWith nibs sized from extra-fine to 1.1mm stub there is a Twsbi to suit every style of writing. If you're looking for smooth writing sensation we would recommend the medium nib or broader.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eIt uses a rubber o-ring on the cap thread to ensure 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\u003cdiv data-show-in-quickbuy=\"\"\u003e\n\u003cp\u003eThis 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\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003ePiston filler - use with bottled ink\u003c\/li\u003e\n\u003cli\u003eInk capacity - 1.17ml\u003c\/li\u003e\n\u003cli\u003eStainless steel nib\u003c\/li\u003e\n\u003cli\u003ePlastic body with aluminium sections and piston\u003c\/li\u003e\n\u003cli\u003eDimensions (Closed): L 118mm x D 13.5mm\u003c\/li\u003e\n\u003cli\u003eDimensions (Posted): L 142mm x D 13.5mm\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight: 19g\u003c\/li\u003e\n\u003cli\u003eSupplied gift boxed with disassembly tools\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Twsbi\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003csection data-turn=\"assistant\" data-scroll-anchor=\"true\" data-testid=\"conversation-turn-4\" data-turn-id=\"request-WEB:a0597b92-0b4f-44ef-94bc-3b1b56e03d6e-1\" dir=\"auto\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv data-turn-start-message=\"true\" data-message-model-slug=\"gpt-5-3\" dir=\"auto\" data-message-id=\"41b7b446-bc2c-4d27-8292-32e25a041a59\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"220\" data-start=\"0\"\u003eTWSBI is renowned for its precision-engineered fountain pens, specialising in smooth, reliable piston-filling systems. Explore our collection to discover modern designs built for everyday writing and lasting performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/hunterpaperco.com\/collections\/twsbi\" target=\"_blank\"\u003eView all Twsbi products we stock\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Twsbi","offers":[{"title":"Extra Fine","offer_id":56588296323458,"sku":null,"price":62.28,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":56588296356226,"sku":null,"price":62.28,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":56588296388994,"sku":null,"price":62.28,"currency_code":"USD","in_stock":false},{"title":"Broad","offer_id":56588296421762,"sku":null,"price":62.28,"currency_code":"USD","in_stock":true},{"title":"Stub 1.1mm","offer_id":56588296454530,"sku":null,"price":62.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0274\/0427\/1699\/files\/TWSBI-Diamond-Mini-Fountain-Pen-Classic-1_1800x1800_e2971533-439f-4e3c-bdb8-d3b8c74ca497.webp?v=1777026369","url":"https:\/\/hunterpaperco.com\/en-us\/products\/twsbi-diamond-mini-classic-fountain-pen-black","provider":"Hunter Paper Co. ","version":"1.0","type":"link"}