Pentair 355093 Impeller Assembly Replacement Pool and Spa Pump Impeller assembly replacement Fits Pentair Challenger high flow pool and spa inground pumps models CFII-NI-2F, CFII-NI-2-1/2A Also fits Pentair SuperFlo and Sta-Rite SuperMax pool and spa pumps For use with 2F, 2-1/2-horsepower motor Measures 5-inch length by 2-1/4-inch height by 5-inch width