Replaceable Rubber Piston
Made up of a replaceable Nitrile Rubber. This Fabric Heel piston is the most cost effective. As long as the piston hub is not worn to indicator marking the rubber can be replaced and used on the existing hub until it becomes too worn.
Bounded urethane piston
Piston hub, material is from premium forged steel ASTM 4140. The rubber part is a Nitrile Rubber.
Long Life Urethane Bonded Piston
Longer service life when used at lower temps as normal drilling conditions. Works best when paired with Ceramic Liners.