... Open1- electrical bearing :60,62,63 series with open,Z,ZZ,RS,2RS,NR available2.material:chrome steel3.quality certification:ISO9001 ... :2000 system4.vibration and noise level:Z1V1,Z2V2,Z3V35.precision level ... service:prompt delivery,OEM available7.Advantage:competitive prices with excellent quality High Quality electrical bearing