1.Standard: JIS G3439 2.Grade: STO-G, H,J, N,C,D, E. 3.Usage: Seamless Steel Oil Well Casing, Tubing and Drill Pipe. Standard: JIS G3439Grade: STO-G, STO-H, STO-J, STO-N,STO-C, STO-D, STO-E.Usage: Seamless Steel Oil Well Casing, Tubing and Drill Pipe.FOB Price/MT:USD700-1,680.00MOQ:10MT Stanard Name: Seamless Steel Oil Well Casing, Tubing and Drill Pipe.Surface: Annealed/Pickled/Polished.Ends: ...