Mulching Blade / Exmark 103-0301Pack Size:1Exmark 103-0301, Exmark 103-0301-S, Exmark 1-603874, Exmark 1-603283, Exmark 613072, Exmark 633483, Exmark 103-2530, Exmark 613112, Exmark 613250, Exmark 103-3231, Exmark 103-3233, Exmark 103-3233-S, Exmark 103-3232, Exmark 103-3232-S, Exmark 103-2530-S, Exmark 1-613112, Exmark 103-1580-sDealer Choice 50-3251, Landscaper Express 231715, Landscaper Express 2233, Landscaper Express 231724, Landscaper Express 321724, NHC 212-0948, Oregon 91-483, Rotary 11139, Rotary 15-11139, Sunbelt B1EM1800Exmark Lazer Z, Lazer XP, Turf Ranger and Turf Tracer; requires 3 for 60" deckLength: 20 1/2 ", Center Hole: 5/8 ", Width: 3 ", Thickness: .203 "