- Compatibility: Fits Pleatco PWW50L, Unicel 4CH-949, Filbur FC-0172, SD-01143, 817-4050, PDC570-AFS, Rising Dragon 50, Baleen AK-90091, Magnum O250, and Darlly 42522. Note: This product is not sponsored or endorsed by any trademarks. - Enhanced Filtration: Features more cartridge folds for improved filter capacity. The inner scrim is triple laminated and polyconstructed, topped with a high-quality, weatherproof coating that resists breakage and maintains crisp, defined folds. - Durable Material: Made from 100% high-quality polyester, this filter cartridge offers a longer lifespan compared to cheaper alternatives, ensuring you get the best value. - Efficient Cleaning: The Trilobal fabric structure allows for easier removal of impurities, restoring the filter to like-new condition after cleaning. Regular maintenance is recommended every two weeks to ensure optimal performance in your hot tub. - Practical Applications: Ideal for hot tub owners seeking reliable filtration, this cartridge ensures clean, clear water for a relaxing experience. Perfect for regular use in residential or commercial hot tubs, providing peace of mind and excellent water quality. - Key Attributes: Designed specifically for compatibility with popular brands, this filter cartridge stands out with its durable construction, superior filtration capabilities, and ease of maintenance, making it a smart choice for any hot tub enthusiast.