Oregon 96-900 Gator G3 Lawn Mower Blade, 21-Inch, Replaces Ariens High-lift: Aggressive blade angle increases air flow to push debris up and out for superior bagging or side discharge Cleaner, more efficient cutting performance can reduce bagging needs Gator Mulcher feature provides efficiency in normal or abrasive conditions Major brand replacement: AYP Replaces OEM No. 521981601