... width950,970,1000,1150,1200(mm)Lengthaccording to customer's requestmaterialspolystyrene foam board,Color steel tileStructureUpper and lower layer: uses color ... steel boardMiddle: polystyrene foam board or polyurethane foam boardThe polystyrene density5,6,8,10,12,14, ... layer is steel sheet, the inner layer is Polystyrene foam plastic, the bottom layer is also steel sheet.2. ...