.1-Casing Sizes: OD 4-1/2"~20" 2.Casing Grade: H40, J55, K55, N80, M65, ... 3.Casing Length: R1,R2, R3 API 5CT Casing 1.Casing Sizes: OD 4-1/2"~20" 2.Casing Grade: H40, J55, K55 ... . D. Range Tubing: From 2-3/8"to 4-1/2"(EUE/NU) Casing: From 4-1/2" to 20", Casing Threads: BTC, LTC ... ,L80,P11012.415315.3412.19J55,K55,N80,L80,P110 API 4 1/2"Oil casing