Mulching Blade / Murray 92003HTPack Size:1Murray 92003HTEdgewater 155628, ESF 114-830, Foley/PLP 114-830, NHC 213-0165, NHC MU2617, Prime Line 7-06414, Rotary 6146, Sunbelt MU-2617, Sunbelt SB-6146Murray Requires 2 for 38" deckLength: 19 7/16 ", Center Hole: 13/16 ", Outer Hole: 3/8 ", Center To Center: 4 ", Width: 2 1/4 ", Thickness: .149 "