UNI-BALL Signo Gel Refill UMR-83E 0.38mm Black

Uni Refill for Signo UMN 307 Gel Pen. Smooth writing due to low viscosity ink. Fast drying suitable for left-handed. Darker lines from fortified ink. To accommodate this hybrid ink, Uni updated the mechanics of the pen with a "twin ball" system. The built-in spring pushes the ball at the pen tip forward, preventing the ink from leaking when not in use.

Article No: UMR 83E-BK