Roofing Sheet, Galvanized Steel, Galvalume Steel manufacturer / supplier in China, offering 1.0mm 1.2mm Thickness Sch40 25mm 30mm Galvanized Steel Round Pipe, 12 14 Gauge Size 1/2 3/4 1"2"1.5"Inch Hot Dipped Galvanzied Steel Pipe, Dx51d+Z Z100 Z30 25mm 1mm 1.5mm Thickness Hot Dipped Galvanized Steel Pipe and so on.