SPECIFICTION: Contains 2 filter cartridge, Length: 3 3/4"; Outside Diameter: 4 1/4"; Top: 1 3/4"; Bottom: 1 3/4" REPLACEMENT MODELS: Cartridge is compatible with summer waves sfs-350, RP-350, RP-400, RP-600, RX-600 and SFS-600 pump models and any filter pump that uses Intex 59900 filter cartridge. Note: Manufacturer names and part numbers mentioned in the text are only to show compatible models, DEBONAIRE is an independent brand NSF/ANSI 50 CERTIFIED: Our pool filter meets rigorous NSF 50 testing and certification standards, ensuring optimal water quality for a safe and healthy swimming experience for you and your family EFFICIENT FILTRATION: The innovative tri-leaf design of our pool filter ensures the efficient removal of a significant amount of debris, Maximizing the efficiency of your hot tub or spa filter and keeping your pool water crystal clear and inviting