... of Origin: Liaoning, China SPECIFICATIONSWell Casing and Tubing Pipe API 5CT Oil Casing PipeMaterials: J55, K55 ... 514" Length: As your request and accord with the requirements of API 5CT. API 5CT Tubing PipeMaterials: J55, ... upset, U: External upset, T&C: Threaded and coupled.Grades: J55, K55, N80 1, N80 Q ... inLength: As your request and accord with the requirements of API 5CT. Tubing and Casing Pipe