The Zento is the latest release from Uni, featuring a new gel ink designed to emphasize smoothness and cushion when writing, while resisting bleedthrough and feathering. Zento ink has a matte finish and dries quickly. These refills are available in either .38mm or .5mm tip sizes, in black, blue, and red.

Zento refills will also fit Uni One Gel Pens, should you prefer that barrel.

Made in Japan.