Hi-Lift Blade / Simplicity 1657589ASMPack Size:1Allis Chalmers 1657589, Dixon 1324, Lesco 050580, Simplicity 1657589, Simplicity 1636451, Simplicity 1657589ASM, Simplicity 1657589A, Simplicity 1636451SM, Simplicity 1657589SM, Troy-Bilt 1747640, Troy-Bilt 1772335Aladdin USP7, Aladdin UGAT18, Dealer Choice 50-2350, Dealer Choice 50-2335, Edgewater 156830, ESF 114-938, Foley/PLP 114-938, Green Meadow USIM12, Laser L1780, Laser 91235, Mow More DI19L, NHC SP2900, Oregon 91-713, Prime Line 7-04526, Prime Line 7-04719, Prime Line 7-06333, Rotary 2079, Rotary 6069, Rotary 15-2079, Sunbelt SB-2079, Sunbelt SB-90939, Sunbelt SB-6101, Sunbelt B1-SP2900, Sunbelt B1SP2900, Sunbelt B1SB6101Simplicity 500, 600, 1300, 4000, 5000 and RT series; requires 2 for 36" deck; Troy Bilt Requires 2 for 36" deckLength: 18 1/2 ", Center Hole: 3/4 ", Outer Hole: 3/8 ", Center To Center: 2 9/16 ", Width: 2 ", Requires 2 for 36" cut, Thickness: .187 "