Mulching Blade / Cub Cadet 759-3939Pack Size:1Cub Cadet 759-3939, Cub Cadet 742-3036NHC 212-0918, Oregon 91-073, Oregon 96-373, Rotary 10636, Sunbelt B1SB10636Cub Cadet GT2186, GT2544, 208, 209 and 2518, 2001 and newer; requires 3 for 44" deckLength: 16 ", Center Hole: 3/4 ", Outer Hole: 5/16 ", Center To Center: 2 1/2 ", Width: 2 1/2 ", Thickness: .203 "