This classroom set includes 30 durable plain white 9" x 12" masonite lap boards. Also included are a box of 30 pocket-style dry erase markers with bullet tips in black and a 30 pack of 2" multi-purpose erasers. An environment friendly way to learn, as you just write, wipe off and re-use with no waste. Markers are AP Certified, Conform to ASTM D-4236.