Hi-Lift Blade / Murray 91871HTPack Size:1Murray 91871HTAladdin UMO21, Edgewater 155634, ESF 114-805, Foley/PLP 114-805, Green Meadow UMU220, NHC MU2609, Oregon 97-109, Prime Line 7-04675, Quality 120840, Rotary 6034, Sunbelt MU-2609, Sunbelt SB-6034Murray Requires 2 for 40" deck: old style bladesLength: 20 3/8 ", Center Hole: 13/16 ", Width: 2 1/4 ", Thickness: .187 ", Requires 2 for 40" cut