6705ZZ (I.D.=25mm, O.D.=32mm, Thickness=4mm) 6705-2Z 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 838 newtons and dynamic load rating of 1100 newtons