... can be used in automobile,precision machinery,electric tools,power tools,sports apparatus,machines ... ZZ Sealed, 2RS Sealed or Open1- bearings for electric motors :60,62,63 series with open,Z, ... chrome steel3.quality certification:ISO9001:2000 system4.vibration and noise level:Z1V1,Z2V2,Z3V35.precision level:P0 ... Advantage:competitive prices with excellent quality High Quality bearings for electric motors