Sakura Pigma Micron Set of 10 Calibrated Pens Calibrated fine-liner technical pen, with pigment ink that combines pigments and water. Ideal for artistic and technical drawings. Permanent, water, light and chemical resistant. When dry it has a neutral pH. Both technical and artistic applications: graphic arts, scrapbooking, cartoons, doodling, file recording, ink illustrations and personal diaries. Contain ten calibrated black pens: - 003 (0,15mm) - 005 (0,20 mm) - 01 (0,25 mm) - 02 (0,30 mm.) - 03 (0,35mm) - 04 (0,4mm) - 05 (0,45 mm.) - 08 (0,50 mm.) - 10 (0,6mm) - 12 (0,7mm)