bearings for electric motors can be used in automobile,precision machinery,electric tools,power tools,sports apparatus,machines Item: All types ... ;Seals Type: ZZ Sealed, 2RS Sealed or Open1- bearings for electric motors :60,62,63 series with open,Z,ZZ,RS,2RS ... available2.material:chrome steel3.quality certification:ISO9001:2000 system4.vibration and noise level:Z1V1,Z2V2,Z3V35.precision level:P0,P6, ...