SKILCRAFT 7520-01-587-7795 Micro Point Liquid Magnus Comfort Grip Roller Ball Pen, 0.5mm Size, Blue Ink (Pack of 4) Permanent pigmented ink which helps prevent document and check tampering Liquid-ink roller ball pen delivers smooth consistent lines Ink reservoir encompasses the whole barrel body for larger ink capacity and write time Fade-proof and water-proof ink lasts over time Made with pride by Americans who are blind