The Hustler 781385 is an authentic OEM flat idler pulley designed for various Hustler zero-turn mower models. This crucial component maintains correct belt tension, which is essential for efficient power transmission and extended belt life. Constructed from durable materials, it ensures reliable performance and smooth operation across demanding conditions. With an outer diameter of 171 mm, an inner diameter of 17 mm, and a width of 33 mm, this pulley is engineered for a precise fit and long-lasting durability. Verify fitment with your specific Hustler model for optimal performance.