Marks-A-Lot Dry Erase Marker, Red, Pack of 12 (24407) Chisel tip marks in a variety of line widths Ink wipes away easily from compatible surfaces with an eraser or dry cloth Suitable for use on whiteboards, glass and other nonporous surfaces Nontoxic formula is safe for children's use ACMI certified. Conforms to ASTM D 4236.