Set of 3 Oregon 596-615 Gator Mulching Small Engine Mower Blades Set of 3 Blades, Quality Gator 596-615 "Fusion G5" Mulching Blades Fits: AYP requires 3 for 48" deck; Husqvarna requires 3 for 48" deck Replaces: AYP 180054,173920, 173921; Husqvarna 532173920, 532173921, 532180054 Weight 2.69 lbs; Thickness .187"; Length 16-11/16"; Center Hole: 5 pt. Star; Width 3" Fusion Blades have Tungsten Carbide "fused" to the edge for longer life. Extended cutting length, blade is sharpened longer up the blade