SF698-2RS Flanged Stainless Steel Sealed Ball Bearing 8mm x 19mm x 6mm SF698-2RS Stainless Steel Flanged Sealed Ball Bearing, SF698-2RS bearings is closed with 2 Rubber Seals, bearing is double sealed and one seal from each side to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.