The AYP 102403X is a genuine OEM tension idler pulley designed for various AYP, Craftsman, Husqvarna, and Poulan lawn tractors and mowers. This flat idler pulley maintains correct belt tension, crucial for the efficient operation of the drive system. Constructed from durable materials, it ensures reliable performance and longevity. Key dimensions include an outer diameter of 109.54 mm (4.3125 inches), an inner diameter (bore) of 9.525 mm (0.375 inches), and a width of 25.4 mm (1 inch). Replacing a worn or damaged tension pulley with the AYP 102403X helps prevent belt slippage, excessive wear, and potential damage to other components.