FR2-5-2RS Flanged Sealed Ball Bearing 1/8" x 5/16" x 9/64" inch FR2-5-2RS Flanged Sealed Ball Bearing, each FR2-5-2RS 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.