For professional and aspiring artists familiar with PIGMA Micron, these new grays are designed for anything from precision shading to covering large areas. These pens are ideal for anime, illustration, cartooning, pen-and-ink drawing, scrapbooking, and other detail work. Details: Cool Gray (#44) 3 pens Permanent, fade resistant, chemically stable, will not bleed or run after the ink has dried Size Information: 01 (0.25 mm) 05 (0.45 mm) 10 (0.6 mm)