Gator Mulcher 3-in-1 Blade to Replace the 137380 Blade Used on 50" Decks, Craftsman, Poulan Pro, Husqvarna. Genuine Gator blade, 20% harder steel for extended blade life. All Oregon blades are austemper heat treated. 17 3/8" long, 2 1/2" wide, .187" thick.