John Deere Blade 21"X 2-1/2" Repl Gx2215 Rotary replacement blade fits John Deere. AM137328 AM137333 AM141033 GX22151 GY20854 2 Blades Required for a 42" Deck Quantity: Pack Rotary Mower Blades manufactures high-quality, OEM replacement lawn mower blades