Additional Details ------------------------------ Bullet point: Special Waterproof Pigment Based Ink makes it permanent and water proof on paper,Experience smooth, skip-free writing and crisp ink colors that leave consistent lettering and lines,Available in 9 different tip sizes (0.05-0.8mm tip) for drawing super fine, fine or thick strokes on paper.,Fine point pen ideal for drawing and writing,Can be used by technical professionals, artists and crafters,No Smudge on any type of paper - total smudge proof Product description: Special Waterproof Pigment Based Ink makes it permanent and water proof on paper,Experience smooth, skip-free writing and crisp ink colors that leave consistent lettering and lines,Available in 9 different tip sizes (0.05-0.8mm tip) for drawing super fine, fine or thick strokes on paper.,Fine point pen ideal for drawing and writing,Can be used by technical professionals, artists and crafters,No Smudge on any type of paper - total smudge proof