The filter core cartridge provides superior water flow and improves pool water clarity. Smaller particles can be removed during pool/spa water turnover. This provides an easy to clean option you can simply rinse off with a garden hose or tube. Features. 50% open ABS free flow cores maximize water flow through REEMAY filter media. Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span. For use with 530 and 800 gallon pumps. Dimensions: 5.5" high x 4.4" diameter. Material(s): plastic/polyester