OEM replacement impeller R0536400 designed exclusively for newer Polaris PB4-60 booster pumps manufactured after December 2011 with serial numbers greater than PB120111001, ensuring perfect compatibility and factory-matched performance.Precision-engineered closed-face design delivers optimal water flow and pressure to maintain maximum cleaning power for Polaris 180, 280, 380, 480, and 3900 Sport pressure-side pool cleaners.Constructed from durable, corrosion-resistant engineering plastic with a reinforced metal hub for reliable operation against chemical exposure, pool debris, and continuous pump vibration.Direct drop-in replacement that requires no modifications—simply remove the old impeller and install the new R0536400, ideal for quick DIY repairs and professional pool maintenance.Restores lost pump performance caused by worn, cracked, or broken impellers, eliminating low pressure, poor suction, and inefficient cleaner movement while offering a cost-effective alternative to dealer pricing.