Description: Kits provide easy field replacement of heavy-duty equipment systems and components. Attributes: Kit includes back-up rings, seal assembly, wear ring, o-ring, wi6per seal, buffer seal assembly, and U-cup seal Fits 2 in (50.8 mm) diameter rod and 3 in (76.2 mm) diameter bore Application: Used to service components of hydraulic cylinders to keep your equipment leak free. Consult your owner's manual or contact your local Cat Dealer for more information.