These Staedtler 301 Markers are suitable for use on whiteboards but have a compact pen format and shape for comfortable use. The ink is fast drying to prevent smudging and won't dry out even if the marker is left uncapped for up to 8 hours. They produce an approximate line width of 1.0 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 6 markers in this pack, in assorted colours. The wallet can be converted into a desk set for added convenience.