Grade: 10#, 20#, 45#, 15CrMo, 12CrMo, 16Mn Thickness: 2 - 65 mm Outer Diameter: 10 - 920 inch Major products : thick-wall seamless steel pipes , large diameter thick-wall pipes , square steel pipe, rectangular steel pipe, round pipes, elbows, flanges, pipe caps, socket and other pipe fittings