... ", 4-1/2" 2)length:R1,R2,R3 3)Grade: J55, N80, L80, C90, T95, P110 pipe tubing and couplings 1 ... -7/8", 3-1/2", 4-1/2" 2) Grade: J55, N80, L80, C90, T95, P110 3) Wall thickness: 4.24 ... 6) All our Tubing accord with API SPEC 5CT standard, and we get the right to use the API 5CT . ODWall thicknessMassIDEndsGradeinchmminchmmKg/mlb/ftmmNU,EUJ55 ...