Product Name Galvanized Steel Pipe tube Material 10#, 20#, 45#, 16Mn, A53(A,B), Q235, Q345, Q195, Q215, St37, St42, St37-2, St35.4, St52.4, ST35,etc Wall Thickness 1MM~12MM or as customer's actual reques Outer Diameter 20MM~508MM or as customer's actual reques Length Length:Single random length/Dou