Arnold 21-Inch Mulching Mower Blade Fits 21" Walk-behind Mowers For AYP, Ariens, Craftsman, Electrolux, Husqvarna, Poulan, Rally, Roper, Weed Eater Contains one blade 5/8" round center hole Replaces O.E. 159267, 532-159267, 165833, 532-165833, 175064, 532-175064, 175065, 532-175065, 189028, 532-189028, 406712, 532-406712