This Schumacher Racing Products factory replacement differential rebuild kit is designed for the Cat PB 4x4 buggy. The kit includes the hardware needed to service the differential, with o-rings, a gasket, a cross spider, metal washers, screws, and pins included in the set. Keeping a rebuild kit on hand lets you restore differential performance without sourcing individual components separately. Features: Includes o-rings, gasket, cross spider, washers, screws, and pins Designed for the Schumacher Cat PB 4x4 differential Factory replacement components from Schumacher Racing Products 7/7/26 cs