For permanent marking on most surfaces. Intense, highly visible, quick drying, water and weather resistant. Precision valve regulates the paint flow. For use on metal, plastic, rubber, wood, ceramics, glass, textiles, cement and more. Includes a 3/4" (19.05mm) barrel, 17cc's of paint, and a large nib that allows for either a 5/16" (7.94mm), 3/16" (4.76mm) or 1/8" (3.18mm) stroke width.