Features: 1) Sizes: OD 2 3/8", 2 7/8", 3 1/2", 4 1/2" 2) Grade: J55, K55, N80, L80, T95, P110 3) Type of threading: STC, LTC, BTC 4) Length: R2 8.53 - 9.75m (28"-32") 5) Standard: API 5CT, API 5B