Oregon Fusion 3-N-1 Mulcher Blade For 62-Inch Convertible Deck John Deere Lawn Mowers 491-471 Replaces OEM No. M143504 Order 3 for a 62-Inch cut Blade length (measured diagonally): 21-9/16-Inch Center hole diameter: 51/64-Inch Width: 2.50-Inch and thickness: 0.250-Inch