(3) 6180 Rotary Blades Compatible With Dixon Industries: 12421, 13922, 13956, 539119840, 539119871, 539129747, 539129775, 9383 Gravely: 03253900, 046999, 08979600, 08979651, 46999, 89796, 8979600, 8979651 Hustler: 793794, 794685 Windsor: 50-2840 Length: 20-1/2" Width: 2-1/2" Center Hole: 5/8" Thickness: 0.2400" Cut Direction: Right