Marteril: 1).Magnetic whiteboard surface. easy to write and clear. 2).foam boardas the middle layer makes the boardstronger. 3).Plastic back ,zinc back or two sides can be chosen. 4).28 mm thick Aluminum frame makes the baord looks nice. Specification: We can make the board size as following: size(cm) pcs/cartonsize(cm) pcs/carton120*804200*1003120*904200*1203120*1004240*1203 150*1004300*1002180*903300*1202180*1003400*1002400*1202 and other speical specifications you need. Price:Price will be best for you