1. Replace Polaris head float part A20 or Pentair Ballast float part EA20 2. The float provides most important balance for the pool cleaner to perform it tasks such as moving, climbing, turning. 3. Compatible with all Polaris 280, 360, 280,180 models pool cleaner Also fits Zodiac Polaris Vac-Sweep 380, Vac-Sweep 360, Vac-Sweep 280, 280 TankTrax models pool cleaner. 4. Compatible with Pentair Legend II, Legend 4-Wheel, Legend 3-Wheel pool cleaner models LL105, LL105, LX 2000, LL505G, LL505GG, LX5000G, LX5000GG and Pentair Kreepy Krauly Platinum Truck Series pool cleaner models LL105PM, LL105PMT 5.Any leaking of water inside the float or cracks on the float, it needed to be replaced. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.