Keep your pool clean and fresh with this Replacement Filter Cartridge. Designed for use with a Hayward CX1100RE, this replacement will provide optimum water flow while clarifying your pool water. It is suitable for up to 40,000 gallons of pool water and can be easily cleaned with a garden hose. This scratch-resistant replacement cartridge is just as tough as the original, and it features high-impact end caps with antifungal biocide added.