... steel structure roof sandwich panel ):PPGI is the material which uses galvanised steel as the basic substrate metal ... process is a prepainted, prefinished ready to use material. 1.The Specification of Prepainted galvanized steel coils ... of window, door, garage doors, roller shutter door, booth, Persian blinds, cabana, refrigerated wagon and so on.Indoor ... :Sheet package:5. Certification:6,Exhibition ,