According to API SPEC 11B
Polished rods, sinker bars, pony rods, centralizers and couplings of all specifications are available.
(1)Conventional Sucker Rod, D-grade, anti- corrosion
OD: 5/8, 3/4, 7/8, 1 inches
Length: 7.62, 8.0, 8.5, 9.14Meters

(2)Ultra Hi-Strength Sucker Rod, HY Type
The HY type ultra hi-strength sucker rod is made from low carbon alloy steel, which has fine plasticity, The rod is processed with forging of the ends, hardening and tempering of the full rod, NC procssing of the ends and surface quenching of full rod.
It has a high tensile strength, its bearing capacity is better than D-grade rod, The rod has hardened surface, so it isbetter than D-grade rod in terms of corrosion resistance and abrasion resistance.

(3)Hollow Sucker Rod
Diluents, corrosion inhibitors, hot oil and so on can be added through inner bore to reduce the viscoity of crude oil and control paraffin buildup in the well, which will help improve the physical pro[erty of the wellbore and the efficiency of the pump. The hollow rod is also suitable for sandy oil wells, Due to the fact that the torsion strength of the hollow rod is bigger than that of ordinary rod, it can be used o drive downhole screw pumping unit. The hollow rod will facilitate installation of control devices in to the well.