Mulching Blade / Exmark 103-6582-SPack Size:1Exmark 103-6582, Exmark 103-2518, Exmark 103-6582-S, Exmark 1-633482, Exmark 633484, Exmark 1-303527, Exmark 103-2508, Exmark 1-303146, Exmark 633482, Exmark 303283, Exmark 103-2528, Exmark 1-633484, Exmark 103-2518-S, Exmark 103-6584-S, Toro 633484, Toro 103-2518Dealer Choice 50-2145, Edgewater 152113, Green Line 34411, J. Thomas BO-178, Laser 91865, Landscaper Express 20-1451, Landscaper Express 20-0641, Landscaper Express 1032530, Landscaper Express 20-0604, Landscaper Express 231002, Mow More EX18E, NHC EM1810, Oregon 91-335, Prime Line 7-06477, Rotary 6291, Rotary 15-6291, Stens B1EM1860, Sunbelt EM-1810, Sunbelt SB-6291, Sunbelt B1SB6178, Sunbelt B1EM1810Exmark Lazer Z (130,000-539,999); Lazer Z HP (260,000-539,999); Turf Tracer (320,000-599,999); and Turf Tracer HP (320,000-599,999); requires 3 for 52" deckLength: 18 ", Center Hole: 5/8 ", Width: 2 1/2 ", Thickness: .203 "