A&I Mower Blade 21/3/4" - B1EP1024,1 After Market Replacement for AYP 752234 204335258 Replacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25-40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges. More resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness. (1) blade for 22" cut walk-behind. C to C: 1-7/8" Center Hole: 5/8" Length: 21-3/4" Outer Hole: 3/8" Thickness: .134 Type: Medium Lift Width: 2" Thanks for looking!