Seamless TubingOutside Diameter: 2-3/8" -- 4-1/2"Wall Thickness: 4.24mm--6.88mmSteel grade: J55 / K55 / N80-1/N80-QStandards: API 5CTApplications: For oil field industriesOuter packing: BundlesProduct origin: ChinaGrade and Size (mm)Grade J55/K55/N80 Size: 60.3*4.24/4.83Grade J55/K55/N80 Size: 73.02*5.51Grade J55/K55/N80 Size: 88.9*5.49/6.45Grade J55/K55/N80 Size: 101.6*5.74Grade J55/K55/N80 Size: 114.3*6.88Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield
strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.Type of finish End: Plain ,short round thread,long round thread,buuttress thread,extreme line