Mechanical tubes and Structural tubes DIN 2448/1629, EN10216-1, EN10216-2 ST37.0 ST52.0 ST37 ST37.5 ST52.0 ST52.3 P195TR1 P235TR1 P265TR1 Size: OD: 6-219mm WT: 1-50mm Richard Shen Ningbo New-Era Steel Tube Co,.Ltd Tel: 0086-574-87334900 Fax: 0086-574-87715158 Mobile: 0086-(0)137 3616 4628 Email: Richard831228@gmail.com Msn: Richard831228@hotmail.com Skype ID: Richard831228