6808DDU 40x52x7 Sealed Ball Bearing6808DDU Sealed Ball Bearing 40mm x 52mm x 7mm 6808DDU Bearing, categorized as slim section, double sealed, radial, deep groove ball bearing, 6808DDU bearing is made from Chrome Steel with chrome steel balls and steel cage, 6808DDU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6808DDU bearing is sealed and self lubricated with grease. The 6808DDU inner diameter is 40mm, the 6808DDU outer diameter is