The Snapper 709729 Lawn Tractor Idler Pulley 4.50" DIA Raw helps maintain proper belt tension and smooth power transmission during operation. Designed to guide and support the drive belt, this idler pulley rotates with the belt while helping keep it properly aligned and tensioned. Its 4.50-inch diameter provides consistent belt movement and supports efficient operation of the tractor’... https://www.wholetoolbox.com/snapper-709729-lawn-tractor-idler-pulley-4-50-dia-raw/709729.html