Thickness:6.5 - 12.70 mm,from 6.5mm to 12.7mm Section Shape: Round Outer Diameter:73 mm Place of Origin:Hebei China (Mainland) Secondary Or Not:Non-secondary Application:Drill Pipe Surface Treatment: parkerizing, copper coating, galvanized Alloy Or Not: Non-alloy price:low feature:high strength OD: from 50mm to 127mm Length: R1 R2 R3 Standard: API 5DP,API Hebei Longway Petroleum Equipment Co., Ltd. Contact:Elena QQ:499558035 Mob: 0086-18333180315 Skype: lwdpsales-Elena Email: lielana@outlook.com