Practicality and performance in one little pen! Pigma Microns are a favorite for making detailed drawings and craft work. Its needle tip works well for artists, writers, and illustrators alike. Best of all, the patented, smooth flowing PIGMA ink is reliable, permanent and of top notch acid free archival quality. Pigma Micron pens are available in seven line width sizes: 005 (.2 mm), 01 (0.25 mm), 02 (0.3 mm), 04 (0.35 mm), 05 (0.45 mm) and 08 (0.5 mm) and multiple colors.