The AYP 194018 Gearbox Pulley is a genuine OEM replacement part designed for the transmission systems of various lawn and garden equipment, including models from Craftsman, Husqvarna, and Poulan. This durable pulley ensures proper power transfer within the gearbox, contributing to the smooth operation of the machine's drive system. It features an outer diameter of 114.3 mm (4.5 inches), an inner bore diameter of 15.875 mm (0.625 inches), and a height of 25.4 mm (1 inch).