F688-2RS Flanged Unground Sealed Ball Bearings 8mm x 16mm x 5mm Lot of 1000 Bearings Lot of 1000 Bearings F688-2RS Flanged Unground Sealed, each F688-2RS bearing is rubber sealed from both sides to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease, inner diameter is 8mm, outer diameter is 16mm and width is 5mm.