Mulching Blade / Exmark 103-2519-SPack Size:1Exmark 103-2519, Exmark 1-653102, Exmark 653102, Exmark 103-2519-S, Gravely 00272900Dealer Choice 50-4070, J. Thomas BO-089, Laser 91719, Mow More EX6820, NHC EM1816, Oregon 91-373, Prime Line 7-06481, Rotary 6820, Sunbelt EM1816, Sunbelt B1EM1816Ariens Requires 3 for 44" deck; Exmark Lazer Z; requires 3 for 44" deck; Gravely Requires 3 for 44" deckLength: 15 1/4 ", Center Hole: 5/8 ", Width: 2 1/2 ", Thickness: .203 "