Waterway 310-4010 Gray Impeller Replacement for Waterway Hi-Flo Discharge Series 1.5-Horsepower Pool and Spa Pump Impeller replacement Fits Waterway Hi-Flo discharge series 1.5-Horsepower pool and spa pump This has an extended inlet opening and at the shaft side Available in gray color Measures 3-2/3-inch length by 4/5-inch width size