Unleash the full cleaning power of your filter pump with the Bestway filter cartridge size I! Measuring 4.25" x 5.35", filter cartridge offers the perfect balance between efficiency and compactness. The easy cleaning and maintenance make them the ideal choice for a smooth pool experience. The fine lamellar structure of these filter cartridges is your secret to effectively trapping impurities. This not only extends the life of your pool, but also that of your filter pump. These filter cartridges are an optimal addition to Bestway filter pumps with a flow rate of 2,006 l/h + 3,028 l/h. To ensure the best possible filter result, we recommend replacing the filter cartridges every two weeks. This not only guarantees clear and clean water quality, but also optimal performance of your filter system. In each pack you will find 2 filter cartridges that make your pool maintenance a real breeze.