Sunbelt B1MA2416 21-3/16-in. XHT Mower Blade for 42-in. Decks is designed for mower decks with a 42-inch cut, especially compatible with MTD, Cub Cadet, and White models. This blade measures 21-3/16 inches in length and 3 inches in width, featuring a Star Center Hole and a high lift, notched design. It is made from Sunbelt’s patented Marbain® heat-treated steel, which is independently tested to provide extreme hardness and toughness. This advanced steel treatment makes the blade approximately 25% to 40% harder than standard lawnmower blades, ensuring a cutting edge that stays sharper for longer and superior resistance to bending and impact damage. The XHT blade delivers the tightest tolerances when d to equipment blades, making it a reliable option. It is equivalent to several models including MTD, Cub Cadet, White, Oregon, Rotary, and Stens blades. Model Number: B1MA2416