Mulching Blade / Murray 042785E701MAPack Size:1Murray 42785E701, Murray 20045E701, Murray 20045HT, Murray 442785, Murray 42785HT, Murray 420045, Murray 442785MA, Murray 774004, Murray 042785E701MA, Murray 42785E701MA, Murray 5548MA, Murray 671921E701, Partner PR1055013Aladdin UMO2, Edgewater 155630, ESF 114-782, Foley/Belsaw 5978623, Foley/PLP 114-782, Home Depot 607103, NHC 212-0311, Oregon 97-016, Prime Line 7-04582, Quality 120839, Rotary 2012, Sunbelt SB-2012, Sunbelt B1MU2601, Sunbelt B1SB2012Murray Most 20" walk behind decks (1996 and newer)Length: 19 5/8 ", Center Hole: 3/8 ", Outer Hole: 3/8 ", Center To Center: 4 ", Width: 2 1/4 ", Thickness: .134 "