Letraset ProMarker is a high performance graphic market with excellent value. Each pen has a broad chinsel nib for a large area filling and a thin bullet tip for a finer detail work. Depending on which side is utilised, the chinsel nib can also produce a wider range of line widths. Latraset ProMarker Pen - Satin Twin Tipped Alcohol Based, Non-toxic and Permanent Ink Multi Surface Application Use on Paper, Card, Vellum, Acetate, Glass, Wood, Metal and Plastic Ideal for Illustrations Description by: Vik