... -3/8"~ 4-1/2" 3.Length: R2 - R3 4.Manufacturer ItemOil tubing CouplingO.D.60.32mm ~114.3mm; 2-3 ... /8”~ 4-1/2”The Type of ThreadLC,STC,BCSteel GradeJ55,N80,K55,P110,L80StandardAPI5CT,ISO9001,ISO1004W ... .T.0.244-4.415in,6.20-1054mmType EUE,NUEUsageFor oil pipe or gas pipe and so onPayment TermT/T or ... is available; 2)anti-corrosion with black painting Tubing Coupling of Oil equipment