6306ZZ (I.D.=30mm, O.D.=72mm, Thickness=19mm); 6306ZZ bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.
6306-2RS (I.D.=30mm, O.D.=72mm, Thickness=19mm); 6306-2RS bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.