Model No.: Product Origin:China Brand Name: Price Terms: Payment Terms: Certification: Description:Product Name: Drill PipesPlace of Origin: ChinaFeatures: Our drilling rod is manufactured with advanced frictional welding and thermal treatment, and has a perfect appearance after burnished by NC machine tool and special device. Each rod has been detected by magnetic powder, ultrasonic wave and electromagnetism, and then has a reliable quality. Every parameter satisfies API criterion.