Oregon Gator Mulcher 3-N-1 Hi-Lift Blade 50-Inch Toro Model 718Z Lawn Mowers 96-323 Replaces OEM No. 113579 Order 3 for a 50-Inch cut Blade length (measured diagonally): 17-Inch Center hole diameter: 5/8-Inch Width: 2.50-Inch and thickness: 0.203-Inch