PoolSupplyTown 4 Pack Wheel Ball Bearing Replacement for Polaris 360, 380, 3900 Sport, ATV Pool Cleaners Part No. 9-100-1108 Provides smooth wheel rotation and operation Fits Zodiac Polaris 360, 380, 3900 Sport, ATV model pool cleaners Also fits Polaris pool cleaner models Vac-Sweep 360, Vac-Sweep 380 Package includes: 4 ball bearings