OptiMA 12" x 18" Double Sided Student Lap Board with Piano Keyboard and Music Staff Lines. Made in the U.S.A. 12" x 18" with smooth rounded corners and bull-nosed edges Print is permanently protected with our exclusive dry erase writing surface and will never wear off. Double Sided - print on one side and plain white dry erase writing surface on the reverse side. Excellent erasing properties - Board erases clean every time - no ghosting