6812ZZ (I.D.=60mm, O.D.=78mm, Thickness=10mm) 6812-2Z bearings are shielded on BOTH SIDES to keep lubricant in Made from Chromium Steel (GCr15), durability and resistance to under heavy loads ABEC Tolerance 1 (P0), Z2 Noise Level for most general use Static load rating of 10600 newtons and dynamic load rating of 11500 newtons