6001ZZ (I.D.=12mm, O.D.=28mm, Thickness=8mm); 6001ZZ bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.
6001-2RS (I.D.=12mm, O.D.=28mm, Thickness=8mm); 6001-2RS bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.