1. Deep groove ball bearing 6307-ZZ
2.material:chrome steel
3.quality certification:ISO9001:2000 system
4.vibration and noise level:Z1V1,Z2V2,Z3V3
5.precision level:P0,P6,P5(ABEC1,ABEC3,ABEC5)
6.service:prompt delivery,OEM available
7.Advantage:competitive prices with excellent quality