{"product_id":"twsbi-diamond-580alr-fountain-pen-black","title":"TWSBI Diamond 580ALR Fountain Pen - Black","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cspan\u003eTWSBI's flagship demonstrator, with a faceted clear acrylic barrel and matte black anodized aluminum hardware. The \"ALR\" designation refers to the aluminum grip and piston mechanism, finished with subtle circular engravings on the grip and cap finial for tactile texture.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cspan\u003eAccessories with \u003ca href=\"https:\/\/thepapermind.mom\/products\/twsbi-diamond-580-fountain-pen-replacement-nib-set\"\u003espare 580 nibs\u003c\/a\u003e and a \u003ca href=\"https:\/\/thepapermind.mom\/products\/twsbi-diamond-50-ink-bottle-50-ml-polished-aluminum\"\u003ematching inkwell\u003c\/a\u003e specially designed for the Diamond 580.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhy It's Special\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFaceted \"diamond-cut\" barrel that refracts light through the ink and keeps the pen from rolling\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHigher ink capacity than the ECO — roughly 1.95 ml via the piston filler\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMachined aluminum grip section, connector, and piston rod (the ECO is all resin)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEngraved tactile grooves on grip and cap finial for slip resistance\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFully user-serviceable; ships with a wrench and silicone grease for disassembly and maintenance\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGerman-made stainless steel nib\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eType: Fountain pen, fine nib\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMaterial: Clear acrylic barrel, matte black anodized aluminum section and trim\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFilling: Piston\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInk capacity: ~1.95 ml\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCap: Screw closure (posting not recommended — the cap engages the piston when twisted on the back)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eClip: Spring metal\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCapped length: 142.2 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBody length: 130.2 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBody diameter: 12.7 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWeight: 26.9 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease note: TWSBI products are not eligible for discounts.\u003c\/em\u003e\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"Extra Fine","offer_id":47860019691685,"sku":"TSB-M7440940","price":72.99,"currency_code":"USD","in_stock":true},{"title":"Fine","offer_id":47860019724453,"sku":"TSB-M7440950","price":72.99,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":47860019757221,"sku":"TSB-M7440960","price":72.99,"currency_code":"USD","in_stock":true},{"title":"Stub 1.1 mm","offer_id":47860021821605,"sku":"TSB-M7440980","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/6046\/2501\/files\/Diamond_580ALR_Black01.webp?v=1779925403","url":"https:\/\/thepapermind.mom\/products\/twsbi-diamond-580alr-fountain-pen-black","provider":"The Paper Mind","version":"1.0","type":"link"}