Sunbelt B1EP1011 21-in. XHT Lawn Mower Blade for 42-in. Decks is designed to fit Husqvarna, Craftsman, AYP, and Poulan mowers with 42-inch decks, including several Husqvarna, Craftsman, AYP, and Poulan lawn tractors and Consumer Z models YTH1542XP. This blade measures 21 inches long by 2-1/4 inches wide and .134 inches thick, featuring a distinctive 5-point star center hole. The blade is crafted from Sunbelt’s patented Marbain® heat-treated steel, which extreme hardness and toughness. This innovative process results in a cutting edge that stays sharper longer, making the XHT blades approximately 25% to 40% harder than standard lawnmower blades. This durability provides tighter tolerances when d to equipment blades, ensuring superior performance and longevity. The package includes one blade, and the blade is equivalent to a wide range of OEM part numbers, making it a reliable for many mower models. Model Number: B1EP1011