Oregon 91-635 Gator G3 Lawn Mower Blade, 21-1/8-Inch, Fits Cub Cadet, Replaces MTD Center hole: 3/4" Aggressive blade angle increases air flow to push debris up and out for superior bagging or side discharge Gator Mulcher provides cleaner, more efficient cutting performance can eliminate the need to bag, saving time and hassle. Replacement for major brand: Cub Cadet