Specifications 1) Certificate: API 5DP, ISO 9001, ISO 29001 2) OD: 2 3/8" to 6 5/8" or 60.32mm to 139.7mm 3) Grade:G105,S135,E75,X95 API Oil Drill Pipe 1.Main features: A. The drill rods comply with the provisions under the Standards API SPEC 5D and API SPEC7. B. The grade of steel for the drill pipe are determined according to the requirements of Group 1 and Group 3 of API SPEC 5D. C. Drill pipe joints at the same level can be supplied, and comply with the provisions under the Standard API SPEC 7. Product Description Sell API-5CT Casing, Tubing, Coupling. Our factory manufacture Casing, Tubing: According to API SPEC 5CT. Steel grade: J55, K55, L80, N80, C95, P110 O. D. Range Tubing: From 2-3/8"to 4-1/2"(EUE/NU) Casing: From 4-1/2" to 20", Threads: BTC, LTC, STC. Length range: R1, R2, R3