R8ZZ Shielded Ball Bearings 1/2" x 1 1/8" x 5/16" inch Lot of 10 Bearings R8ZZ Shielded Ball Bearings, the inner diameter is 1/2", outer diameter is 1 1/8" and the width is 5/16", also bearings are pre-lubricated with grease, Bearings are made of Chrome Steel each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, Bearings are packed 10 bearings in one plastic tube.