10-Pack Flanged Bearings SFR188-2RS Sealed 1/4" x 1/2" x 3/16" BearingsSFR188 2RS Flanged Sealed Ball Bearings Stainless Steel 1 4" x 1 2" x 3 16" inch Lot of 10 Bearings SFR188 2RS Flanged Sealed Stainless Steel Ball Bearings, a standard bearing size with dimensions commonly used across many industries: 1 4" x 1 2" x 3 16" inch. each bearing are rubber sealed from both sides to protect the bearing from dust or any possible contamination, additionally, these bearings come pre lubricated with grease for smooth operation.