Hi-Lift Blade / MTD 942-0171BPack Size:1MTD 742-0171, MTD 742-0171B, MTD 942-0171B, Troy-Bilt 942-0171B, Troy-Bilt 742-0171BAladdin UMT14, Dealer Choice 50-2130, Edgewater 155523, Green Line 153356, Green Meadow UMT37, Kwik-Fix 814221, Laser L1659, Laser 91147, NHC 212-0808, Oregon 98-037, Prime Line 7-04541, Quality 120752, Rotary 3356, Sunbelt SB-3356, Sunbelt B1SB3356MTD Requires 3 for 50" deck; Troy Bilt Requires 3 for 50" deckLength: 17 1/4 ", Center Hole: 3/8 ", Outer Hole: 5/16 ", Center To Center: 2 1/2 ", Width: 2 1/2 ", Requires 3 for 50" cut, Thickness: .187 "