UNI-BALL Signo Refill UMR-85 – Blue

The UNI-BALL Signo UMR-85 (and UMR-85N) is a premium 0.5mm blue gel ink refill. It features smooth-flowing, water-resistant, and acid-free pigment ink that prevents smearing and fading. The refill utilizes an edgeless tip design to reduce paper friction and is compatible with retractable pens like the UMN-155 (RT1), UMN-105, and UMN-152.