1.EPS PU rockwool,metal. 2. cheap, economical building material 3.used for dorm, office, warehouse, fence ... environmental friendly,can be recycle. Applicationswidely used as roof and wall panel in warehouses, factories, exhibition halls, prefabricated houses, container ... and civil buildings. cheap EPS PU rockwool color coated steel plate Sandwich Panel colourbond for roof wall fence prefab house and ...