This kit contains a complete replacement set of wheel bearings for your Baja 5B. All bearings are ABEC rated, rubber sealed and are a direct replacement for the factory bearings. This bearing size will also replace the clutch and output shaft bearings. Pick up a set of these and toss them in your tool box. These shielded bearings offer a higher level of protection for your RC vehicle. Kit includes eight (8) 12 X 24 X 6 rubber shielded bearings.