Notched Hi-Lift Blade / Exmark 103-6404-SPack Size:1Exmark 103-6404, Exmark 103-6404-S, Exmark 103-6394, Exmark 103-6384Dealer Choice 50-3456, J. Thomas BL-033, Laser 91861, Landscaper Express 36384, Landscaper Express 1036404, Landscaper Express 6394, Oregon 92-033, Rotary 11229, Rotary 15-11229, Sunbelt B1SB11229Exmark Lazer Z (540,000 and higher); requires 3 for 72" deckLength: 24 1/2 ", Center Hole: 15/16 ", Width: 3 ", Thickness: .203 "