The Bestway Flowclear Filter Cartridge (IV) is the perfect choice for keeping your pool clean and clear. It is designed to fit all Bestway Flowclear filter pumps and is easy to install and maintain. The filter cartridge is made from high-quality materials and is designed to last for up to 4 weeks. It traps dirt, debris, and other contaminants, ensuring that your pool water is always clean and safe. The filter cartridge is also designed to be easy to clean and replace, so you can keep your pool looking its best all season long. With the Bestway Flowclear Filter Cartridge (IV), you can enjoy a clean and clear pool all summer long.