... or Open1- metric miniature bearing :2.material:chrome steel3.quality certification:ISO9001:2000 system4.vibration and noise level:Z1V1,Z2V2 ... ,P6,P5(ABEC1,ABEC3,ABEC5)6.fields used in: motor,automobile,precision machinery,electric tools,power tools,sports apparatus,office ... service:prompt delivery,OEM available8.Advantage:competitive prices with excellent quality High Quality metric miniature bearing