6809DU Sealed Ball Bearing, categorized as slim section, double sealed, radial, deep groove ball bearing, 6809DU bearing is made of Chrome Steel with chrome steel balls and steel cage, 6809-DU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6809DU bearing is sealed and self lubricated with grease,inner diameter is 45mm, outer diameter is 58mm and width is 7mm.