QualityParts From Oregon That you can depend on. Center hole: 1-1/8": Requires 3 blades for 72" cut; For 72" cut, use RC72 deck with Kubota models: B2150D, F2560, and F3060; Superior mulching for bagging and discharge efficiency; Enhanced hardening to keep the blade sharper and more durable; Made to exact OEM specifications; Replaces major brand: Kubota Oregon Equipment Parts 91-493 Blade Kubota 24-9/16In[450]