6808LU Sealed Ball Bearing 40x52x7mm6808LU Sealed Ball Bearing 40mm x 52mm x 7mm 6808LU Bearing, categorized as slim section, double sealed, radial, deep groove ball bearing, 6808LU bearing is made from Chrome Steel with chrome steel balls and steel cage, 6808LU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6808LU bearing is sealed and self lubricated with grease. The 6808LU inner diameter is 40mm, the 6808LU outer diameter is 52mm