... : 10#, 20#, 1020, C22, 1045, C45, 1010, CK10, Q195, Q235, Q345B, S185, S235JR, E235B......3. SizesOD: 18-120mmWT: 1.2-18mmLength ... of low carbon steel pipe, such as:Regular shape seamless steel pipe / tubeRound seamless steel pipe / tubeTriangle seamless steel pipe / tubeSquare seamless steel pipe/ tubeHexagon seamless steel ...