6809-2RS Sealed Ball Bearing 45mm x 58mm x 7mm 6809-2RS Sealed Ball Bearing, categorized as slim section, double sealed, radial, deep groove ball bearing,6809-2RS bearing is made of Chrome Steel with chrome steel balls and steel cage,6809-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,6809-2RS bearing is sealed and self lubricated,inner diameter is 45mm, outer diameter is 58mm and width is 7mm,the quality is set to EMQ (electric motor quality) to ensure high speed,6809-2RS bearing is lubricated with grease.