The performance targets of drill pipe model E75, X95, G105, S135 our company saled were achieved API SPEC 5D standard requirements With material of high-quality Proved by used for many years and the scientific experiments, the drill pipe model E75, X95, G105 and S135 our company saled were made of after a multi-channel precision machining processes, together with strict quality control procedures Standard: API SPEC 5D Usage: for well drilling