COMPATIBILITY: Engineered specifically to fit the Polaris 280, 280 TankTrax, 280 BlackMax, TR28P, Quattro, and 180 pressure-side Vac-Sweep pool cleaners - 6-Pack PREMIUM PERFORMANCE: The C60 Ball Bearing ensures smooth rotation of the Polaris wheel assembly and is a critical component to maintaining long-term performance by helping reduce hose tangling to keep the cleaner in proper contact with the pool floor, and enable more efficient maneuverability throughout the pool. WHAT'S INCLUDED: The C60 Ball Bearing is a Polaris genuine part and includes 1 complete replacement bearing for smooth wheel rotation. There are a total of 8 C60 Ball Bearings found on compatible Polaris Cleaners, located on each side of each wheel.