Thickness:6.88 - 12.70 mm Section Shape: Round Outer Diameter:73 mm Place of Origin:Hebei China (Mainland) Secondary Or Not: Non-secondary Application:Drill Pipe Technique:ERW Certification:API Surface Treatment: parkerizing, copper coating, galvanized Special Pipe:API Pipe Alloy Or Not: Non-alloy price:low feature:high strength Hebei Longway Petroleum Equipment Co., Ltd. Contact:Elena QQ:499558035 Mob: 0086-18333180315 Skype: lwdpsales-Elena Email: lielana@outlook.com