Oregon Fusion Blade For 48-Inch John Deere 100 Series Lawn Mowers 491-108 Replaces OEM No. GX20250 Order 3 for a 48-Inch Cut Blade Length (Measured Diagonally): 17-Inch. Center Hole Diameter: 11/16-Inch., Outer Holes Diameter: 13/32-Inch., Center-to-Center Distance of Outer Holes: 3-45/64-Inch. Width: 2.25-Inch and Thickness: 0.164-Inch.