Description:Kits provide easy replacement of heavy-duty equipment systems and components.Attributes:• Kit includes o-rings, U-cup seal, lip type seal, wear ring, buffer seal, dust ring, dust seals, piston seal, and back-up rings• Fits 110 mm (4.33 in) diameter boreApplication:Used to service components of boom control cylinders to keep your equipment leak free. Consult your owners manual or contact your local Cat Dealer for more information.