Pentair 355074 Impeller Assembly Replacement Pool and Spa 1-1/2 HP Pump Impeller assembly replacement Fits Pentair Challenger, Pinnacle high flow pool and spa 1-1/2-horsepower inground pumps Also fits Pentair SuperFlo and Sta-Rite SuperMax pool and spa 1-1/2-horsepower pumps Measures 4-3/4-inch length by 2-1/2-inch height by 4-3/4-inch width