QualityParts From Oregon That you can depend on. Center hole: 13/16": Requires 1 blade for 30" cut; High-lift: The aggressive blade angle increases air flow to push debris up-and-out for superior bagging or side discharge.; Superior mulching for bagging and discharge efficiency; Enhanced hardening to keep the blade sharper and more durable; Replaces major brand: Murray; Oregon Equipment Parts 97-330 Blade Murray 056246E701Ma 30