... 2. ABEC1, ABEC3, ABEC5 3. Z3,Z4 Deep Groove Ball Bearing:1.Chrome steel material Gcr152.Open, ZZ, 2RS3. High accuracy4. Low noise5 ... bearings.8.Supply ability: 2,000,000 per month MaterialChrome steel Type6000 Series Model:6000-6048 6200 Series Model:6200-6248 ... , Fitness equipment, Washing Machine, Vacuum Cleaner, Office equipment. Deep Groove chrome Ball Bearing