This 4 pack of Staedtler Whiteboard Markers is ideal for the classroom, workplace or home. The markers have an innovative ink technology that allows you to leave a marker uncapped for up to 8 hours at a time without it drying up. The 1 mm bullet tip allows for precision marking. They are ideal for smaller whiteboards and memo boards. The ink can be dry-wiped without leaving residue on whiteboards and smooth surfaces like glass and porcelain. For peace of mind the markers are free of environmentally harmful substances such as toluene and xylene. The markers are also are easy to refill with Staedtler refill stations. The ink is toluene and xylene free for your peace of mind. The colours included in the pack are red, green, blue and black.