... E.X.G.S) OD :2-3/8,2-7/8,3-1/2,4,4-1/2,5(inch) Upset:IU,EU,IEU ... and API spec. 5DSpecification: O.D 2 3/8, 3 1/2, 4, 4 1/2, 5, 5 1/2,6 5/8Steel Grade: E75 ... 100XT, 200XT, &300XT, BOTN3000, ARMACORMApplication: using for oil well drillingO.D.GradeWall ThicknessUpset Ends,For welded-on Tool JointsTool Joint Drill ... new designsaccording to our costomers US API 5DP certificated S135 2-3/8" Drill Pipes