N850 Black is a robust everyday permanent marker. These Robust permanent markers will write on almost any surface including metal, wood, glass, card and plastic. They have a plastic barrel and a square shaped cap to prevent the marker rolling away! A great choice for industry and commerce. The ink is fast drying yet rich in colour. Ink flow is controlled by a valve mechanism to allow a precise application. You can now have these great markers for use in your home, office, garage or workshop.