6 Assorted Sizes, 005, 01, 02, 03, 05, 08. Unparalleled Archival Quality. Pigma Micron pens were the first water-based pigment ink in the consumer market in 1982! Used in many private Institutions and universities, these pens are widely used throughout the world for all types of research and preservation requirements. The Pigma Micron is a fine-point drawing and illustration pen that utilizes the highest quality archival formula known as Pigma ink. The Pigma Micron is ideal for archival recording, illustration, graphic art, scrapbooking, freehand manga drawings, and decorative fabric design. All Micron pens have archival quality Pigma ink, are non-smearing when dry, waterproof and chemical proof, fade resistant, and don't bleed through most papers. Comes in a set of 6 point sizes: 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.45mm, and 0.5mm. Note: Not recommended for use on fabrics intended to be washed, on food service or ceramics that are washed, and not evaluated for cosmetic use on skin. They meet ACMI non-toxicity standards.