Check the listing for details. Hayward TriVac 700/500 Side Roller Kit. Color: Blue, Condition: New. Listed at 14.95 USD. Hayward TriVac 700/500 Side Roller Kit (TVX7036-234) Hayward TriVac 700/500 Side Roller Kit (TVX7036-234) are replacement parts that are made by Hayward and used the same high-grade materials that were used to make the original Factory parts. this makes them genuine OEM parts that all our customers can trust. This Kit was created to aid the cleaner in its effort to maneuver around the surfaces of the pool as well as decrease the amount impact and wear the cleaner and the pool surfaces take over their lifetime. These Rollers are strategically placed along the front side of the cleaner so when it gets to a trouble area like the steps and corners of the pool, it can absorb the impact and move left or right to continue with the cleaning process. The parts are White with a Blue rubber compound tire which takes the brunt of the impact and lessens the overall wear the cleaner takes when hitting the steps or corners. There is a total of 5 of these rollers needed along the front side of the cleaner for this feature to work accurately and are very easy to remove and replace if needed.