... /black/green board green board,chalk board,writing board1.Surface : Green painted steel sheet.2. Inner of the green board ... can be 7-layer strongs cardboard, Honeycomb board, MDF board3. The back face ... corners5. With 2pcs/4pcs hangers for fixing on the wall, with 1pc pen tray for puting marker6 ... in all kinds of white board, black board, green board , flip chart and so on , our ...