This Warwick Bullet Tip Permanent Marker has a 1.5mm bullet tip which is ideal for drawing thicker, bolder lines. It features a triangular shaped barrels for a comfortable, ergonomic grip as you write. The black ink is permanent and smudge-free, and the drying time is ast. They are great for use on a variety of materials including metal, glass, wood, ceramics, cardboard, and paper. These markers are perfect for keeping at your desk, drawer, or stationery cupboard and and more. This comes in a pack of 4 permanent markers in assorted colours (blue, black, red, green).