The Guardian Premium Pool Filter Cartridge 413-106-02 2-Pack is a high-quality replacement filter designed for Pentair C4326 cartridges. Made by Guardian Filtration in the United States, this cartridge filter is efficient and reliable for maintaining clean and clear pool water. With a convenient 2-pack unit quantity, this product ensures that you have an ample supply of filters on hand for regular maintenance and replacement needs. Perfect for pool owners looking for durable and effective filtration solutions, the Guardian Premium Pool Filter Cartridge is a top choice for ensuring crystal-clear water in your pool or spa.