{"product_id":"twsbi-580","title":"TWSBI Diamond 580 Clear","description":"\u003cp data-start=\"36\" data-end=\"353\"\u003eThe \u003cstrong data-start=\"40\" data-end=\"61\"\u003eTWSBI Diamond 580\u003c\/strong\u003e fountain pen blends modern engineering with classic demonstrator style, making it one of the most beloved pens in the TWSBI lineup. Crafted with a faceted, diamond-cut barrel, the 580 beautifully showcases your ink while providing a comfortable, balanced writing experience for everyday use.\u003c\/p\u003e\n\u003cp data-start=\"355\" data-end=\"814\"\u003eBuilt with TWSBI’s signature piston-filling mechanism, the Diamond 580 offers a generous ink capacity and smooth, consistent flow. The transparent body allows you to monitor ink levels at a glance, while the precision-engineered stainless steel nib delivers a reliable and customizable writing experience. Designed to be user-serviceable, the 580 can be easily disassembled for cleaning and maintenance—perfect for fountain pen enthusiasts who love to tinker.\u003c\/p\u003e","brand":"Pen Realm","offers":[{"title":"Extra Fine","offer_id":42763740643412,"sku":"M7443110","price":55.99,"currency_code":"USD","in_stock":false},{"title":"Fine","offer_id":42763740676180,"sku":"M7443111","price":55.99,"currency_code":"USD","in_stock":false},{"title":"Medium","offer_id":42763740708948,"sku":"M7443112","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Broad","offer_id":42763740741716,"sku":"M7443113","price":55.99,"currency_code":"USD","in_stock":true},{"title":"1.1 Stub (Not Customizable)","offer_id":42763740774484,"sku":"M7443114","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/1141\/3076\/files\/TWSBIDiamond-580-Clear.jpg?v=1772582266","url":"https:\/\/penrealm.mom\/products\/twsbi-580","provider":"Pen Realm","version":"1.0","type":"link"}