... .Name: tubing couplings 2.Std Ref: API 5CT 3.Grade: J55,K55,N80,L80,C90,P110,N80-1,N80-Q 4 ... sizeType of TreadO.D*L(mm)Weight(kg)API 5CT EUE tubing couplings2-3/8"NUE73.02*107.951.282-3 ... 5CT3.API couplings for oil tubing and casing.4. Grade:J55,K55,N80,L80,C90,P110,N80-1,N80-Q5. Size ... ,wooden case ,wooden pallet or by customer requests API 5CT EUE tubing couplings