6024ZZ Shielded Ball Bearing 120mm x 180mm x 28mm One Ball Bearing 6024ZZ Shielded Ball Bearing, bearing is Chrome steel, 6024ZZ has Electric motor quality, each 6024ZZ bearings is closed with 2 Metal Shields, one Shield from each side, to protect the bearing from dust or any possible contamination, also 6024ZZ bearing is pre-lubricated with grease, Bearing 6024ZZ has industrial packaging.