Pentel N50S Permanent Bullet Marker Fine Black (Pack of 12) N50S-AInside the robust aluminium barrel of each Pentel N50S permanent marker is quality Pentel indelible ink that writes smoothly on almost any surface from plastic and metal to glass. The fine bullet tip is ideal for general purpose use in industry or commerce. The 3. 18mm bullet tip writes between 0. 5 1. 0mm line width. This pack contains 12 black markers. Durable permanent marker Writes on almost any surface from cardboard metal wood plastic and glass