All polished rods are made of high-quality alloy cold-draw steel, with great strength and toughness, smooth surfaces and extended lifespan.All polished rods are made of high-quality alloy cold-draw steel, with great strength and toughness, smooth surfaces and extended lifespan.

General polished rods comply with API Spec 11B Standard, with the same exterior threads at both ends (cone angle=9°), including three specifications: 1-1/8", 1-1/4" and1-1/2".General polished rods comply with API Spec 11B Standard, with the same exterior threads at both ends (cone angle=9°), including three specifications: 1-1/8", 1-1/4" and1-1/2".

End upset polished rods comply with SY/T5029 Standard, including three specifications: 1", 1-1/8" and 1-1/4". The upset ends are the same with those of sucker rods. In application, the upset ends are connected with the couplings of sucker rods.End upset polished rods comply with SY/T5029 Standard, including three specifications: 1", 1-1/8" and 1-1/4". The upset ends are the same with those of sucker rods. In application, the upset ends are connected with the couplings of sucker rods.