The Artline 90 Permanent Marker is ideal for marking a variety of porous and non-porous surfaces including steel, glass, cardboard and wood. It has a chisel tip so you can attain broad and fine strokes easily. The markers have a chisel nib so you can attain a 2-5 mm line width. They are suitable for a variety of surfaces including cardboard, wood, steel and glass. These fibre tip markers are xylene free, waterproof and instant drying.