6309ZZ (I.D.=45mm, O.D.=100mm, Thickness=25mm); 6309ZZ bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.
6310ZZ (I.D.=50mm, O.D.=110mm, Thickness=27mm); 6310ZZ bearing are shielded on BOTH SIDES to keep lubricant in; Chromium Steel long-life bearings, smooth and low noise.