Use dry erase markers for marking on white boards and most nonporous surfaces, including glass. Feature unique patented Thumb Button Cap for one handed cap release, extra large ink supply and Microban for antimicrobial protection. Ink flows smoothly on the surface and wipes away clean with a dry cloth or eraser. Erase with no residue. Large barrel is made from durable plastic with a molded chisel tip. Vented cap conforms to small parts safety specifications. Certified AP nontoxic.