The Edding 4085 Chalk Marker features highly opaque water-based liquid chalk, perfect for use on non-porous surfaces like blackboards, mirrors, and glass. Its fine bullet tip allows for precise lines between 1-2mm wide, ideal for detailed work. The chalk ink is easily removable with a damp cloth. Before use, shake the marker and pump the nib a few times to activate the ink. This marker is odorless and lightfast, offering dust-free drawing. It's great for creative home use on windows and mirrors, as well as for professional-looking designs on shop windows and menu boards in restaurants, bars, and hotels. The Edding 4085 is available in 20 vibrant colors.