http://tinyurl.com/lw2m2xy<P>Oregon 21-Inch Universal Mulching Lawn Mower Blade 90-621Product Review<P> Click on the link for more reviews<P>Blade length (measured diagonally): 21.1-inch<P>Blade width 2.25-inch<P>Blade center hole diameter 0.38-inch Outer hole: 0.38 x 1.370-inch<P>
