Hi-Lift Blade / Exmark 103-6582-SPack Size:1Exmark 1-633482, Exmark 103-6584, Exmark 103-2528, Exmark 103-6584-S, Exmark 1-303527, Exmark 633484, Exmark 103-2508, Exmark 1-303146, Exmark 633482, Exmark 303283, Exmark 103-2518, Exmark 1-633484, Exmark 103-2518-S, Exmark 103-6582-S, Toro 103-2528Dealer Choice 50-2295, Edgewater 152114, Green Line 1510071, J. Thomas BO-18, Laser 91858, Landscaper Express 20-1451, Landscaper Express 20-0641, Landscaper Express 1032530, Landscaper Express 20-0604, Landscaper Express 231002, Mow More EX18, NHC EM1802, Oregon 91-312, Sunbelt EM-1802, Sunbelt SB-91312, Sunbelt B1EM1802, Sunbelt B1BC1202Exmark Lazer Z (130,000-539,999); Lazer Z HP (510,000-599,999); Turf Tracer (510,000-599,999); and Turf Tracer HP (440,000-599,999); requires 3 for 52" deckLength: 18 ", Center Hole: 5/8 ", Width: 2 1/2 ", Thickness: .203 "