Our Pony Rods incorporate the longer wearing surface to provide the best Pony Rod for your Triplex or Duplex pump.HB piston rods are manufactured to exacting standards to meet today?s tough oilfield requirements., available for a wide range of triplex mud pumps. Manufactured from high quality alloy steel Surface is induction hardened for maximum case hardness and core strength - hard on the outside, tough on the inside Precision ground mirror surfaces meet rigid quality control standards and minimize wear, High quality Grayloy?material is used on all Southwest Duplex Piston Rods. This corrosion-resistant, high-density, long-wearing surface results in fewer packing changes and longer life for gland bushings and junk rings. Southwest rods are furnished with a heavy duty Piston Lock Nut. HB offers a full range of clamps for mating the piston rod to the crosshead extension (pony) rod. Machining tolerances are tightly held to assure proper fit and alignment of the adjoining components. HB clamps are furnished complete with all required hardware.