BFO1024 Features: * Mulching blade * Fits most AYP, MTD, murray, sears, snapper and other mowers * Carded * 10.45 lbs * Made in USA Options: * Available in 20"", 21"" and 22"" sizes Specifications: * All blades have 1"" center hole with a cover washer and 6 reducing washers in 0.38"", 0.44"", 0.5"", 0.56"", 0.63"", and 0.81""