6304ZZ (I.D.=20mm, O.D.=52mm, Thickness=15mm); 6304ZZ bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.
6304-2RS (I.D.=20mm, O.D.=52mm, Thickness=15mm); 6304-2RS bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.