When accuracy, minute details, and preservation count, the unparalleled archival quality of Pigma Micron pens makes them everyone's first choice. The first disposable technical pen using archival pigmented ink, Pigma Micron ink pen is selected for fine-point technical and artistic applications. Sizes: 01 = 0.25 6 Colors: one each brown, red, green, blue, black and purple. - Archival quality ink for use in acid-free environments - Chemically stable, waterproof, and fade resistant - No smears, feathers, or bleed-through on most papers * Color: Brown, Red, Green, Blue, Black and Purple * Use: Pen * Size: 01=0.25 * Included: 6 pens per pack