Oregon Gator Mulcher 3-N-1 Blade For 60-Inch Z Trac Models 7-Iron Decks John Deere Lawn Mowers 96-730 Replaces OEM No. M128485, and M144196 Order 3 for a 60-Inch Cut Blade Length (Measured Diagonally): 21in. Center Hole Diameter: 29/32in. Width: 2.50in. And Thickness: .250in.