pipe tubing and couplings: 1)O.D.2-3/8", 2-7/8", 3-1/2", 4-1/2" 2)length:R1 ... Grade: J55, N80, L80, C90, T95, P110 pipe tubing and couplings 1)Size: O.D. ", 2-3/8", 2-7 ... /8", 3-1/2", 4-1/2" 2) Grade: J55, N80, L80, C90, ... 5) Thread: 8RD and 10RD 6) All our Tubing accord with API SPEC 5CT standard, and we get ... 7/873.020.2175.519.186.1762.00NU,EU3-1/288.90.2545.5413.118.8176.10NU,EU4101. ...