Dry-erase Board, Wood Frame, 30"x40" Functional and basic, melamine writing boards are a practical and reusable writing surface for the classroom. The hardwood frame is stained and finished with all four corners precision mitered for extra strength. Each board features a full-length marker rail for easy access to markers and eraser. Boards sized 3' X 4' and smaller feature v-nail construction, a 1" frame face width, and utilize Quartet's patented 'J' hook hanging system. Larger sized boards feature clamp-nail construction, a 1-3/4" frame face width and a heavy-duty 'L' clip installation kit for safe, simple and precise mounting every time.