The Bestway Flow Clear Swimming Pool Filter Replacement Cartridges are designed for use in above ground pools, with a capacity ranging from 530-1500 gallons. These filter cartridges, model 58012E, are manufactured in China and are suitable for keeping your pool water clean and clear. The cartridges are easy to install and provide efficient filtration to maintain the quality of your swimming pool. With the trusted Bestway brand name, you can rely on these cartridges to effectively filter out impurities and debris, ensuring a refreshing and enjoyable swimming experience.