6307ZZ (I.D.=35mm, O.D.=80mm, Thickness=21mm); 6307ZZ bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.
6307-2RS (I.D.=35mm, O.D.=80mm, Thickness=21mm); 6307-2RS bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.