Racing Go Kart Complete set Ball Bearings Rear Axle, Front Wheel and id Spindle Bearings Set of 10 Bearings High Quality Complete set Ball Bearings for Racing Go Kart, Set Contains 10 Bearings. 8 bearings has 2 metal shields and 2 bearings has rubber seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.