55 x 40 x 11mm Piston U-Cup W/ 6.35mm Wearband & POM Retaining Ring

This sealing set combines both a plastic retaining ring (AR) and a urethane piston U-cup (RSE) RSE (These urethane piston U-cups utilize an L-shaped anti-extrusion ring/bearing designed into the outside of the heel. These seals offer high elasticity and low deformation and abrasion resistance, along with superior anti-extrusion capabilities. These are commonly used with plastic retainer rings, which hold the seal in its groove.) AR (These plastic retaining rings are commonly used with the RSE piston u-cups. Their primary use is to hold the seal from sliding off the piston during the return stroke. They allow for a piston to be designed with the steel to be removed from the end for easy installation of the piston seal.) Temperature: -22°F to 230°F Pressure: 0 to 5800 PSI