... /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 ... in all kinds of white board, black board, green board , flip chart and so on , our ... trade relations with you on mutual benefit. Green board,chalk board,writing board BW-V1,2 ...