A roller ball pen that is easy and comfortable to write with Archival quality ink chemically stable, waterproof, and fade resistant. No smears, feathers, or bleed-through on most papers Perfect for doodling, journaling, daily writing, and more, Gelly Roll ink is waterproof and fade resistant. It won't smear, feather, or bleed through most paper, so your creations will stand the test of time. The Blue, Green, Rose, Purple, and Red pens in this set feature archival, pigment-based ink that is chemically stable, waterproof, and fade resistant. The fluorescent pens in this set feature fluorescent ink that glows under black light. Tip Size : 1.0 mm Ink Color : 12 Assorted colors