Seamless steel tubes API5L API 5CT ASTM A106 Gr. B X42 X46 X52 N80 J55 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