OptiMA 9x12 Single Sided Student Dry Erase Lap Boards (12 Pack) 9" x 12" Single Sided Dry Erase Lap Boards make learning fun and interactive. MADE IN THE U.S.A. and Made with Real Dry Erase Material not Masonite or Shower Board Complies with CPSIA-2008, Section 101(a)(2)(C) regarding lead content and with CPSIA-2008, Section 108 regarding Phthalates. Smooth Rounded Corners and Bull-Nosed Edges - Convenient 12 Pack Sturdy Single Sided 1/8" Thick MDF Hardboard Material