This classroom set includes 30 durable masonite lap boards that are plain white and 9" x 12". Also included is 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.