SR8-2RS Sealed Ball Bearings Stainless Steel 1/2" x 1 1/8" x 5/16" inch Lot of 10 Bearings SR8-2RS Sealed Stainless Steel Ball Bearings, this is a popular size that could be used in many application that uses this size 1/2" x 1 1/8" x 5/16" inch. Bearings are made of Stainless Steel, each bearing are rubber sealed from both sides to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease, Bearings are packed 10 bearings in one plastic tube.