Toothed Blade Center Hole: 7 pt. star, Width: 2 1/2 ", Packaging Type: Branded label, Specially designed: to replace 7 pt. star center hole, Thickness: .187 ", Length: 17 ". Replaces Part Numbers: John Deere GY20852, John Deere GX21784, John Deere AM141035. Stens Part Number: 302-440