Stens # 400-500 Blade Adapter for AYP 193707, AYP 184590, AYP 418373, HUSQVARNA 532193707, HUSQVARNA 532184590, HUSQVARNA 532418373AYP 193707, AYP 184590, AYP 418373, HUSQVARNA 532193707, HUSQVARNA 532184590, HUSQVARNA 532418373 Sold on Amazon