Description:Cat U-cup seals provide a fluid tight seal between components. Their U-shaped cross-section automatically compensates for higher pressures to maintain a constant seal.Attributes:• Material: Bronze PTFE and Polyurethane• Fits 68.275 mm (2.687 in) diameter rod• Groove Diameter: 80.325 mm (3.162 in)• Groove Width: 11.125 mm (0.437 in)Application:Used for hammer power group on Cat hydraulic hammers. Consult your owner's manual or contact your local Cat Dealer for more information.