The MTD 68304058A is a genuine OEM idler pulley tensioner designed for various MTD, Cub Cadet, and Troy-Bilt lawn and garden equipment. This critical component ensures proper belt tension, contributing to the efficient operation of the drive system or deck. It features an outer diameter of 114.3 mm (4.5 inches), an inner diameter (bore) of 9.525 mm (0.375 inches), and a width of 25.4 mm (1 inch). Weighing approximately 0.226 kg (0.5 lbs), this durable pulley is essential for maintaining optimal performance and longevity of your equipment's belts.