... serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80, T95, , 5" ... serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80, T95, 7" ... serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80, T95, 10 3 ... STB410,STB510JIS G3441 Gr. SCM 415 TK,SCM 418 TK,SCM 420 TK,SCM 430 TK,SCM 435 TK,SCM 440 TKAPPLICATION:1,API ...