6305ZZ Shielded Ball Bearing 25mm x 62mm x 17mm Shielded Ball Bearing, 6305ZZ Electric motor quality, each 6305ZZ bearing is closed with 2 Metal Shields, one Shield from each side, to protect the bearing from dust or any possible contamination, also 6305ZZ bearings are pre-lubricated with grease, Bearing 6305ZZ has industrial packaging.