Ideal for writing, sketching and drawing, the Staedtler Pigment 308 Liner features a long metal tip, great for use with rulers and templates. The pigment ink is indelible, lightfast and waterproof, and the pen has a cap off time of up to 18 hours. This set contains 6 pens with black ink and assorted line widths (0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.5mm and 0.8mm).