Pigma Micron pens are acid-free and archival, making them ideal for any application requiring precision and permanance. Pigma ink is derived from a single pigment to ensure color consistency, and is fadeproof against sunlight or UV light. - Sakura Pigma Micron Pens - Set of 16, Black, AssortedPigma Micron Pen, BLACK CUBE 16 PC SET - Includes one each Pigma Micron in sizes 003 (0.15 mm) , 005 (0.20 mm), 01 (0.25 mm), 02 (0.30 mm), 03 (0.35 mm), 05 (0.45 mm), 08 (0.50 mm), 10 (0.60 mm), 12 (0.70 mm), one each Pigma Graphic in sizes 1 mm, 2 mm, and 3 mm, two Pigma PN (0.45 mm) pens, and two Pigma Brush pens. Black ink.