Blue Non Erasable Refills for Rollerball Sharpie, Expo, uni ball, Paper Mate

uni-ball Vision Elite Rollerball Pen Refills feature waterproof and fade-proof pen ink. Each rollerball refill is airplane-safe to prevent bursting and leaks due to changes in cabin pressure.

uni-ball Vision Elite Rollerball Pen Refills feature high-viscosity, fluid-saturated pen ink. A genuine uni-ball refill can help prevent check fraud because the pigment-based uni Super Ink bonds permanently to paper. It's also fade- and water-resistant and acid-free. Each package includes one blue and one black ink refill.