The Simplicity 1736044A is a genuine OEM 21-inch mower blade, engineered for optimal cutting performance and longevity. This high-quality replacement blade is crafted from durable metal, designed to withstand rigorous use across various Simplicity lawn mower models. With a length of 533.4 mm (21 inches), a width of 57.15 mm (2.25 inches), and a center hole diameter of 22.225 mm (0.875 inches), it provides a clean and efficient cut. It is an essential component for maintaining the pristine condition of your lawn, ensuring reliable operation and a professional finish.