Notched Air-Lift Blade / Exmark 103-6402-SPack Size:1Exmark 103-6402, Exmark 103-6402-S, Exmark 103-6387, Exmark 103-6397, Exmark 103-6392, Exmark 103-6387-S, Toro 109-6873Dealer Choice 50-2306, J. Thomas BL-0023, Laser 91863, Landscaper Express 36387, Landscaper Express 96322, Landscaper Express 36397, Landscaper Express 1036402, Landscaper Express 6392, NHC 212-0334, Oregon 92-030, Rotary 11267, Rotary 11495, Rotary 15-11495, Rotary 15-11267, Rotary 11450, Rotary 11451, Sunbelt B1SB11495Exmark Lazer Z (540,000 and higher); requires 3 for 52" deck; Toro Titan Z5200 ZTR's; requires 3 for 52" deckLength: 18 ", Center Hole: 15/16 ", Width: 2 1/2 ", Thickness: .203 "