The Hayward CX400-RE R is a compatible replacement for the following pool and spa filters:
The Hayward CX400-RE Comp. Pool Filter Cartridge has a diameter of 8 1/2 inches, and a length of 10 3/4 inches. This spa filter cartridge has a closed string handle top, and an open bottom which has a diameter of 4 inches. This pool filter replacement will keep the water in your pool or spa clean and clear.