This is a genuine manufacturer-sourced component which is specially designed for use with MTD and Yard Machines riding lawn mowers and garden tractors. The purpose of this pulley is to apply tension to the belt. It provides an identical replacement for a missing or a faulty part that was installed on a new unit. Please make sure to refer ...Read moreto the appropriate diagrams of your model for the exact location and application of this idler pulley. Keep in mind this high-quality item is made of durable metal and is sold individually.