Pentair 355067 Impeller Assembly Replacement Pool and Spa 1 HP Inground Pump Impeller assembly replacement Fits Pentair Challenger, Pinnacle high flow pool and spa inground 1-horsepower pumps Also fits Pentair SuperFlo and Sta-Rite SuperMax pool and spa 1-horsepower pumps Measures 4-1/2-inch length by 2-1/4-inch height by 4-1/2-inch width