This gel ink refill is specialized for the Uni-ball ONE gel pens.
Uni-ball One Gel Ink Refill UMR-38S 0.38mm or UMR-05S 0.5mm
Experience the smooth, reliable performance of our Gen Pen Refills, meticulously crafted in Japan for unparalleled quality. Made with durable polypropylene, these refills ensure a consistent writing experience, perfect for everyday use or important tasks. Elevate your writing with the precision and comfort you deserve.
