VISION ELITE BLX Series Hybrid Gel Pen, Stick, Bold 0.8 mm, Assorted Ink and Barrel Colors, 5/Pack Capped rollerball pens feature smooth-flowing pigment-based black ink infused with dramatic color. Produces an outstanding ink lay-down for pronounced lettering and vivid drawings. Uni-Flow Ink System ensures a consistent, delightfully fluid writing experience. Fade-proof liquid roller pens have uni Super Ink that makes them water and fraud-resistant. Airplane-safe ink prevents leakage even when cabin pressure changes.