1) OD: 2 7/8", 3 1/2", 4", 4 1/2", 5" 5-1/2" 2) Steel Grade: E75, X95, G105, S135 3) Drill pipe are made according to API 1) OD: 2 7/8", 3 1/2", 4", 4 1/2", 5" 5-1/2" 2) Steel Grade: E75, X95, G105, S135 3) Drill pipe are made according to APIDrill pipe Standard: API SPEC 7 & API 5D or under the customers needs.OD Range: 2-3/8-6-5/8Steel Grade: X95, G105, S135, P110Internal Coating: TK34, TC2000, ...