... ZZ 2)ISO 9001:2000 3)Bearing steel 4)low vibration, low noise, low friction, high accuracy The products are widely ... ABEC-3 ABEC-5Number of RowSingle RowInner Diameter17mmOutside Diameter40mmWidth12mmUsesGeneralDeep groove ball bearing 6203-ZZWe have open ,ZZ ,2RS ,Z ,RS.Under ... the normal storage and preserve protect condition, the bearing's rustresisting period is half a year over, you should ...