QualityParts From Oregon That you can depend on. Center hole: 5/8": Requires 3 blades for 72" cut; Superior mulching for bagging and discharge efficiency; Enhanced hardening to keep the blade sharper and more durable; Replaces major brands: Simplicity, Dixon, Bobcat, Ferris, Husqvarna, Kees, Lastec, Massey Ferguson, and Snapper; ; Oregon Equipment Parts 91-609 Blade Ferris 5102227 25In[41