Pentair 355086 Impeller Assembly Replacement Pool and Spa Pump Impeller assembly replacement Fits Pentair Challenger, Pinnacle high flow pool and spa inground pumps model CFII-NI-2A Also fits Pentair SuperFlo and Sta-Rite SuperMax pool and spa pumps For use with 1-1/2F, 2-horsepower motor Measures 5-inch length by 2-1/4-inch height by 5-inch width