This Artline 100 Permanent Marker has a large, chisel nib which is perfect for writing both thick and thin lines. The marker contains fast drying ink which will mark a range of surfaces including glass, steel and plastic. This marker has a thick chisel nib which can create lines up to 12 mm thick. It is perfect for making permanent lines on a range of materials. This ink is alcohol based, instant drying and waterproof. The pen has a thick barrel which is easy to grip. The ink is xylene free and RoHS compliant. This marker contains red ink.