Hi-Lift Blade / Murray 22860E701MAPack Size:1Murray 22860E701, Murray 22860, Murray 22860HT, Murray 22860E701MAAladdin UMO9, Edgewater 155639, ESF 114-784, Foley/PLP 114-784, Green Meadow UMU21S, NHC 212-0842, Oregon 97-110, Prime Line 7-04673, Quality 120841, Rotary 3390, Sunbelt SB-3390, Sunbelt B1SB3390Murray 21" walk behindLength: 20 7/8 ", Center Hole: 3/8 ", Outer Hole: 3/8 ", Center To Center: 2 1/2 ", Width: 2 1/4 ", Thickness: .149 "