1)Aluminum frame with ABS corners, 12mm thick. 2)Easy writing and erasing white surface, metal bac,. 3)Plastic marker tray. 1.Smooth Metal Magnetic surface board leads to the fluent writing feeling .2.Double surface Aluminum frame and Galvanized Steel bottom makes the board more strong3.Any Size from 30*20(cm) to 400*120(cm) are available.4.Caron packing.5.Hanging on the wall firm6.More than 10 ...