pipe tubing and couplings: 1)O.D.2-3/8", 2-7/8", ... 3)Grade: J55, N80, L80, C90, T95, P110 pipe tubing and couplings 1)Size: O.D. ", 2-3/8", 2-7 ... 24- 16mm 4) Length: R1,R2,R3 5) Thread: 8RD and 10RD 6) All our Tubing accord with API SPEC 5CT ... standard, and we get the right to use the API 5CT . ODWall ... 2716.8818.2312.25100.50NU,EU API 5CT pipe tubing and couplings