627ZZ Double Shielded Ball Bearing 7mm x 22mm x 7mm 627ZZ Double Shielded Ball Bearing, each 627ZZ bearing is closed with 2 Metal Shields, one Shield from each side, to protect the bearing from dust or any possible contamination, Bearing is Chrome steel ,Electric motor quality, also 627ZZ bearings are pre-lubricated with grease, Bearings 627ZZ have industrial packaging.