Brief Introduce: Certificate: API 5DP, API Q1, ISO 9001, ISO 29001 Size Range: 60.32-168.28mm OD: 2 3/8â?�, 2 7/8â?�, 3 1/2â?�, 4â?�, 4 1/2â?�, 5â?�, 5 1/2â?�, 6 5/8â?� Grade: G105, S135, X95, E75 Wall Thickness: (0.25-0.50) inch or (6.45-12.70) mm Length: R1: 6.10-7.01m; R2: 8.84-9.75m; R3: 12.19-13.72m Upset style: IU, EU, IEU Products Features: High quality raw material and advanced heat treatment make the products higher hardness and toughness. Especially it has higher low temperature toughness. Smoother and longer upset taper length and high performance pipe extends the drill pipes service life. Meet or exceed API SPEC 5DP, API SPEC 7-2, and API RP 7G requirement. dopt complete advanced testing method and strict quality control to ensure the high quality and stable performance products. Holding advanced technology, high end product R&D capabilities and senior technical workers, we can provide customers special requirement products.