hdg,ppgi,gl,gi,ga,colour coated steel sheet,coil, galvanized ... +ZApplication:Outdoor: roof, roof structure, surface sheet of balcony, frame of window, door, door of garage, roller shutter door, ... cabana, refrigerated wagon and so on.Indoor: door, isolater, frame of door, light steel structure of house, sliding door, folding ... and edge will cause dent and scratches.thanks HDG,GL,PPGI,GA,GI steel coil