Set of 4 (0.1mm, 0.3mm, 0.5mm, 0.7mm). The long metal tip of Marsgraphic's pigment liner is designed for use with rulers and templates and applications such as writing, sketching and drawing. It is an indelible, lightfast and waterproof pigment ink. It is erasable when used on tracing paper and does not bleed when highlighted. Available in 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.5mm and 0.7mm line widths or a set of four.