Create vibrant and intricate chalkboard displays with this Pack of 12 Uni Ball Chalk Markers. Designed to write on and wipe off non-porous surfaces, these rain-resistant markers are fantastic for parties, window displays, and notices. With 12 bright and versatile colours included, you can take your display to the next level. Water-based paint pen Works well on non-porous surfaces such as chalkboards and glass. Perfect for pub, and restaurant signs, the Chalk Marker is rain-resistant so your message can withstand the elements (within reason). Writes on and wipes off Not suitable for porous surfaces.