The Pigma Micron Pen is the first fine-point writing instrument offering a water-proof, quick-drying, black pigment ink. They are ideal for technical drawing, graphics, drafting and fine line illustration. Unlike dye-based ink found in most pens and markers, Pigma pigment ink is of archival quality, waterproof, fadeproof and smudge-proof on porous surfaces when dry. It does not feather and will not bleed through paper. This price is for ONE pen only.