Pentair 355369 Impeller Replacement Challenger High Pressure Inground Pool and Spa Pump Impeller replacement Fits Pentair EQ-Series commercial plastic pump models EQW 300, EQWK 300, EQW 500, EQWK 500, EQ500, EQK500, EQ750, EQK750, EQ1000, EQK1000, EQK1500 For impeller 1-horsepower full rated and the 1-1/2-horsepower up rated Challenger pumps Measures 15-inch length by 14-1/2-inch height by 8-inch width