Toothed Blade Not recommended for use with mulch kit, Packaging Type: Branded label, Center Hole: 5 pt. star, Length: 17 3/8 ", Recommended to use part 285-383 heavy-duty spindle assembly, Width: 2 1/2 ", Thickness: .187 ". Replaces Part Numbers: AYP 137380, Husqvarna 532137380, Craftsman 137380, AYP 156468. Stens Part Number: 302-436