metal steel sheet sandwich board 1.many colors 2.for wall and roof use 3. ... the base operations of Fiber Cement Board,CRC Board,Magnesium Oxid Board,Mgo-Gypsum Board,WoodGrain Calcium Silicate Board,Glass Fiber Ceiling,Mineral Wool Ceiling,Steel ... ,EPS,XPS core and with the fiber cement boards , calcium silicate boards and mgo boards as the side board, those are mainly ...