steel tubing: Standard:ASTM,DIN, JIS, Material quality:Q195,Q235,Q345,J55,10#,45#etc O ... .D.:16-700mm Wall thickness: 0.6-60 steel tubing:Standard ... :ASTM,DIN,JIS,Material quality:Q195,Q235,Q345,J55,10#,45#etc ... by our customer with the competitive price andthe good quality.Pls contact me for futher infor. My E-mail ...