This OEM idle mandrel pulley kit includes the pulley, spacer/washer, and a bushing. This idle mandrel pulley spins the blade on a lawnmower deck of a tractor mower.A new idle mandrel pulley kit will be needed if the bearing for this pulley is damaged, broken, or lost because the bearing is not available by itself. If the bearing inside of the pulley is not spinning freely as it should, then the entire idle mandrel pulley kit will be needed to repair this machine. Remember to wear gloves when operating or performing care and maintenance on any outdoor power equipment machines.This genuine MTD part is sourced directly from the manufacturer and sold individually. The idle mandrel pulley kit is compatible with lawn tractors manufactured by MTD, Yard Machines, Bolens, Yard-Man, Troy-Bilt, Poulan, Cub Cadet, Husky, and Murray.