Detailed Product Description oil tubing API 1) Tubing O. D.: 2-3/8", 2- ... ) Steel grade: J55, K55, N80, H40 5) Standard: API SPEC 5CT, API SPEC 5B 6) High quality 7) Reasonable price Tubing Standard ... API Spec 5CTODWall ThicknessMassIDEndsGradeinchmminchmmkg/mlb/ftmm J55, K55,N80,L80, P110,2- ...