6808UU Sealed Ball Bearing 40x52x7mm6808UU Sealed Ball Bearing 40mm x 52mm x 7mm 6808UU Bearing, categorized as slim section, double sealed, radial, deep groove ball bearing, 6808UU bearing is made from Chrome Steel with chrome steel balls and steel cage, 6808UU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6808UU bearing is sealed and self lubricated with grease. The 6808UU inner diameter is 40mm, the 6808UU outer diameter is 52mm