Detailed Product Description tubing pup joint APIProduct Name: oil tubing pup joint (pipe fitting pup joint, pipe fitting)Standard Reference: API spec 5CTSize: From 2-3/8" -4-1/2" Surface treatment: CoatingProtection of Thread: Thread protectorGrade: J55, K55, N80-1, N80-Q, L80, C90, P110Thread Type: STC, LC, BTC. Dimensions and their tolerances of tubing round-thread as per API spec 5B