These Bic Great Erase Liquid Ink Dry Erase Markers are tank-style markers with bullet tips that deliver a smooth ink flow with bold, vivid colours. Ideal for use on dry-erase boards, glass and most nonporous surfaces. Erase easily with minimal ghosting or staining. Quick-drying and nontoxic, great for use at home, office or school. Colours include one each in blue, black, red and green.