The Guardian Filtration 2 Pack Spa Filter Cartridge 413-106-02 is a set of high-quality replacement cartridges designed specifically for the Pleatco PRB25-IN model. Made by Guardian Filtration in China, this 2-pack ensures that you have an extra filter on hand for your spa. These cartridge filters are essential for maintaining clean and clear water in your spa, providing a relaxing and enjoyable experience for you and your guests.