Three (3)Pack Rotary Mower Blades Replace John Deere GX21784 AM137757 AM141035 GY20852 Rotary replacement blade fits John Deere Windsor AM137757 AM141035 GX21784 GY20852 50-2082 3 Blades Required for a 48" Deck Quantity: Pack Rotary Mower Blades manufactures high-quality, OEM replacement lawn mower blades