The Uni-ball Zento Gel Pen Refill is designed for smooth, reliable writing with a 0.38 mm or 0.5 mm conical tip. Its ink formulation reduces friction, feathering, and bleed-through, ensuring every line stays clean and controlled.
Quick-drying and water-resistant, this refill helps prevent smudges while maintaining clarity on the page. Compatible with Uni-ball Zento pens, it’s an easy way to extend the life of a favorite tool while keeping your notes and annotations sharp.