Teachers will love these Staedtler 341 Whiteboard Markers, as they're compact in size, and have a universal tip to produce line widths of approximately 1.2 mm. Left handed students and teachers don't have to worry about smudging thanks to the fast drying ink, plus, these markers won't dry out, even if left uncapped for up to 8 hours. They produce an approximate line width of 1.2 mm. Your markings can be dry wiped from whiteboards and other surfaces like glass and porcelain. The ink is low in odour, xylene and toluene-free and fast drying for less smudging and smearing. Each marker has a polypropylene barrel for long lasting use. They can be left uncapped for up to 8 hours without the ink drying out. There are 4 markers in this pack, in assorted colours.