GI Coil GI coil have a very strong corrosion resistance and long use ... spangle, non-spangleSurface TreatmentChromate, Oil, Lacquer Seal, Phosphating, etc Application:GI coil products are mainly used in construction, light industry, auto ... Plate, Cold Rolled Steel Plate, Mild Steel Plate, Structure Steel, difference kind of pipes, Galvanized Steel Pipe, Seamless Steel Pipe, Square ...