4 x 8 x 3 Flanged Sealed Ball Bearings Lot of 10 Bearings 4 x 8 x 3 Flanged Sealed Ball Bearings, this is a popular size that could be used in many RC Cars and Trucks or any application, Bearings are made of Chrome Steel, each bearing has 2 Seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.