The Mission White Liquid Chalk Markers are fantastic for use on all types of dry-wipe markerboard. These pens provide a great alternative to traditional dry wipe markers. The liquid chalk markers are non-toxic, water based, odourless and can be simply wiped away. Each pack contains four white 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. Mission Dry Wipe Markerboard Liquid Chalk Pens. Perfect for use on the Mission Black Drywipe Marker Boards. Each pack contains 4 Pens. Colour: White Mission - Liquid Chalk Pens - Dry Wipe - Pack 4 - White