Hot Racing Aluminum 12mm Multi Width Hex Hub, 30 to 60mm spo disabled 10x15x4 bearing for increased durability 10x15x4 bearing for increased durability and bearing life steel axial guide and gasket that comes with the plastic differential case Stock Gasket from (TRA3978) Installation of the gear set and attaching to bevel gear thread locking adhesive to keep screws from loosening due to vibration Hot Racing multi width hex adapters fit many 1:10 scale models with 12mm hex drives four light weight 15mm hex adapters four 15mm hex adapter four 5mm hex adapter four heavy duty Hot Racing wheel washer four 15mm cap screw four 25mm cap screw four o ring four lock pin four 5x8 shim