Pilot VBall Liquid Ink Refills fit the VBall RT Retractable Rolling Ball Pens. These ink refills contain smooth writing, smear-proof liquid ink and are available in a 2-pack with extra fine (0.5mm) points for your favorite Pilot VBall Ink pens. The refills feature a liquid ink feed system that assures smooth, skip-free and consistent writing. They are even safe for airplane use. The unique liquid ink formula maintains consistent flowing strokes - no smearing or blotting.