Center Hole: 13/16 Requires 3 blades for a 54″ cut High-performance blade Superior mulching for efficient collection and discharge Heavy-duty tempering to keep the blade sharp and durable Manufactured to exacting OEM specifications Replaces major brands: John Deere and Scotts Dimensions: Shipping Length: 22.9″ Shipping Width: 3.8″ Shipping Height: 2.8″ Weight (shipped): 2.504 lbs Replaces OEM: John Deere – GY20569 John Deere – M111523 John Deere – M114582 John Deere – M113518 John Deere – M135590 Stens – 330-401 John Deere – M115329 Scotts – M115496 John Deere – M115496 John Deere – M76467