R4AZZ bearing chrome steel Open, ZZ, 2RS Clearance, Vibration, Tolerance as customer's request miniature deep groove ball bearing R4AZZ bearingchrome steel or stainless steelOpen, ZZ, 2RSclearance, vibration, tolerance as customer's requestOur factory is ISO9001 qualified producer, owning 12 automatic processing lines, with the annual output of 25million sets of deep groove ball bearing.We supply ...