Mulching Blade / Exmark 103-6394-SPack Size:1Exmark 103-6394, Exmark 103-6394-S, Exmark 103-6384, Exmark 103-6404J. Thomas BL-279, Laser 91867, Landscaper Express 36384, Landscaper Express 1036404, Landscaper Express 6394, NHC 212-0730, Rotary 11244, Sunbelt B1SB11244Exmark Lazer AS, AC, LC, XP, XS, and Next Lazer Z ASX; requires 3 for 72" deckLength: 24 1/2 ", Center Hole: 15/16 ", Width: 3 ", Thickness: .203 "