{"product_id":"zento-uni-ball-black-gel-pen-umn-sf","title":"Zento Uni-ball Black Ink Gel Pen UMN-SF","description":"\u003cdiv class=\"product-description-container\"\u003e\n  \u003ch2\u003eUni-ball One F (UMN-SF) - Premium Low Center-of-Gravity Gel Pen\u003c\/h2\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eRefined Writing. Unmatched Stability.\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003cp\u003eThe \u003cstrong\u003eUni-ball One F\u003c\/strong\u003e is an elevated evolution of the award-winning Uni-ball One series. Designed for those who seek a professional writing experience, the \"F\" stands for \u003cem\u003eFeel\u003c\/em\u003e—emphasizing a design that fits naturally in your hand and provides a grounded, stable writing sensation.\u003c\/p\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Metal Tip (Stabilizer):\u003c\/strong\u003e Unlike standard plastic pens, the One F features a precision-engineered metal nose cone. This shifts the weight toward the tip, creating a low center of gravity that reduces hand fatigue and allows for smooth, controlled strokes with minimal pressure.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRevolutionary \"One Ink\" Technology:\u003c\/strong\u003e Experience the darkest black and most vivid colors in the industry. The pigment-based ink is formulated to sit on top of the paper fibers, resulting in crisp, high-contrast lines that are smudge-proof and water-resistant.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSophisticated Aesthetic:\u003c\/strong\u003e The seamless, minimalist barrel is finished in a range of \"faded\" muted tones inspired by nature. Its sleek matte texture and signature functional metal wire clip make it a statement piece for any desk.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast-Drying Performance:\u003c\/strong\u003e Ideal for left-handed writers and fast-paced note-taking. The ink sets instantly, keeping your pages clean and professional.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eBest For\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHeavy Note-Taking:\u003c\/strong\u003e The weighted balance is perfect for students and professionals during long writing sessions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBullet Journaling \u0026amp; Scrapbooking:\u003c\/strong\u003e Pairs perfectly with \u003cstrong\u003e160gsm premium paper\u003c\/strong\u003e, ensuring your artistic layouts are sharp and vibrant without bleeding through.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModern Calligraphy:\u003c\/strong\u003e The 0.38mm and 0.5mm tips offer extreme precision for fine detailing and headers.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n  \u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eUMN-SF (Uni-ball One F)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003ePoint Size\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e0.38mm \/ 0.5mm Available\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eInk Color\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003ePigment-based Black (Ultra-Dark)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eBody Weight\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eApproximately 14.3g (Balanced Weighted Tip)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eRefillable\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eYes (Uses UMR-38S \/ UMR-05S Refills)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e","brand":"Zento","offers":[{"title":"0.5mm \/ Light Yellow","offer_id":46504988049598,"sku":"UMN-SF-01","price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.5mm \/ Pink","offer_id":46504988082366,"sku":"UMN-SF-03","price":5.99,"currency_code":"USD","in_stock":false},{"title":"0.5mm \/ Red","offer_id":46504988115134,"sku":"UMN-SF-05","price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.5mm \/ Water Blue","offer_id":46504988147902,"sku":"UMN-SF-07","price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.5mm \/ Black","offer_id":46504988180670,"sku":"UMN-SF-09","price":5.99,"currency_code":"USD","in_stock":false},{"title":"0.5mm \/ Gray","offer_id":46504988213438,"sku":"UMN-SF-011","price":5.99,"currency_code":"USD","in_stock":false},{"title":"0.5mm \/ Green","offer_id":46504988246206,"sku":"UMN-SF-013","price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.38mm \/ Light Yellow","offer_id":46504990376126,"sku":null,"price":5.99,"currency_code":"USD","in_stock":false},{"title":"0.38mm \/ Pink","offer_id":46504990408894,"sku":null,"price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.38mm \/ Red","offer_id":46504990441662,"sku":null,"price":5.99,"currency_code":"USD","in_stock":false},{"title":"0.38mm \/ Water Blue","offer_id":46504990474430,"sku":null,"price":5.99,"currency_code":"USD","in_stock":false},{"title":"0.38mm \/ Black","offer_id":46504990507198,"sku":null,"price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.38mm \/ Gray","offer_id":46504990539966,"sku":null,"price":5.99,"currency_code":"USD","in_stock":true},{"title":"0.38mm \/ Green","offer_id":46504990572734,"sku":null,"price":5.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0538\/7966\/8926\/files\/imgi_48_O1CN01g7NW2Y1MNmJ23PRgE__2-item_pic.jpg?v=1773803304","url":"https:\/\/obujo.com\/en-jp\/products\/zento-uni-ball-black-gel-pen-umn-sf","provider":"OBUJO","version":"1.0","type":"link"}