The Mission Liquid Chalk Markers are fantastic for use on all types of markerboard. These pens provide a colourful alternative to chalk and 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.