The Mission Liquid Chalk Markers are fantastic for use on all types of Dry wipe markerboard. These pens provide a colourful alternative to traditional dry wipe markers. The liquid chalk markers are non toxic, water based, odourless and provide vibrant colours that can be simply wiped away. Each pack contains 8 differently coloured markers and every marker is fitted with a reversible nib that can be set to either bullet or chisel. The pens can be used to write on all non porous surfaces.