Patented formula removes dry erase marks, ghosting and shadows to keep dry erase boards looking new. Also, wipes away permanent markers and pen inks on dry erase boards, blackboards, desktops, countertops, plastic, fiberglass, leather and other surfaces. Biodegradable water-based wipes are safe on all surfaces. 30 wipes, 7" x 12" size, per canister. 6 canisters per case. Sold by the case.