Notched Air-Lift Blade / Exmark 103-6402-SPack Size:1Exmark 103-6402-S, Exmark 103-6402, Exmark 103-6387, Exmark 103-6397, Exmark 103-6392, Exmark 103-6387-S, Toro 109-6873J. Thomas EX-18, NHC 212-2839, Rotary 11450, Rotary 11451, Sunbelt B1EM1840, Sunbelt B1SB11231, Sunbelt B1SB11248, Sunbelt B1SB11495, Sunbelt B1SB11229Exmark 52" deck Lazer Z (540,000 and higher); Toro Titan Z5200 ZTR'sLength: 18 ", Center Hole: 15/16 ", Width: 2 1/2 ", Thickness: .250 ", Heavy-duty