... , DIN,GB Grade: CGCC, Prepainted galvanized steel coils ( steel structure roof sandwich panel ):PPGI is the material ... galvanized steel coils :Outdoor: roof, roof structure, surface sheet of balcony, frame of window, door, garage doors, ... roller shutter door, booth, Persian blinds, cabana, refrigerated wagon and so on.Indoor: door, isolators, frame of door, light steel structure ...