Description:Cat U-cup seals provide a fluid tight seal between the hydraulic cylinder and shaft. Their U-shaped cross-section automatically compensates for higher pressures to maintain a constant seal.Attributes:• Material: Urethane rubber• Fits diameter 50 mm (1.9685 in) shaft• Groove Diameter: 63.023 mm (2.481 in)• Groove Width: 11.10 mm (0.437 in)Application:Used as needed to service hydraulic cylinder components to keep your equipment leak free. Consult your owner's manual or contact your local Cat Dealer for more information.