Uni-Ball UniChalk PWE5M Glass Marker Bullet Tip White (Pack of 6) 264614000The Uni Chalk marker is a multi purpose marker with a superb dust free chalk finish and ink that can be easily erased with a damp cloth. Combining ease and practicality, it is rain resistant, making it ideal for use outdoors on windows, light panels or blackboards. Perfect for professionals in the education, hotel, catering and convenience store sectors wishing to make temporary decorations on mirrors, windows, place cards and more. Supplied in a pack