... 5CT 5.Place of Origin: Liaoning, China SPECIFICATIONSWell Casing and Tubing Pipe API 5CT Oil Casing PipeMaterials: J55, K55, ... 0.205" - 0.514" Length: As your request and accord with the requirements of API 5CT. API 5CT Tubing ... N: Non upset, U: External upset, T&C: Threaded and coupled.Grades: J55, K55, N80 1, N80 Q, L80, ... ,C90,C95,P110,Q125, OD: from 2 -3/8" to 4-1/2” Wall Thickness ...