The Exmark 109-0996 Lawn Mower Idler Pulley is designed to help maintain proper belt tension and smooth operation in compatible mower systems. Measuring 8 inches and featuring a flat pulley design, it works with the mower belt system by guiding the belt and helping maintain consistent tension as the belt moves during operation. Proper belt alignment and tension can support efficient p... https://www.wholetoolbox.com/exmark-109-0996-lawn-mower-idler-pulley-8-flat-34/109-0996.html