Polaris R0517200 Transmission Gear and Bushing Kit for Polaris 9400/9300 Sport Robotic Pool Cleaners.
Transmission Gear/Bushing, (1 Set) This item replaces one side of the gears and bushings on the Polaris robotic cleaner. If you need all 4 gears/bushings, you will need to order 4 of this part number.