http://tinyurl.com/kcz8ylw
Oregon Lawn Mower Blade 20-9/16-Inch For Ariens/Huskee 11370 & 11285 91-005Product Review
Click on the link for more reviews
Replaces OEM No.11370, 11285
Blade length (measured diagonally): 21.5-inch
Blade width 2.75-inch
Blade center hole diameter 0.38-inch