Better Compatibility: Works effortlessly with Polaris 280 and 480 utility bags (parts K13 and K16). You will receive 2 packs of durable bags. High-Quality Materials: These nylon pool cleaning bags with strong stitching and mesh are woven, durable, reusable, and tear-resistant. It can hold all kinds of debris: leaves, insects, twigs, sand, and silt, which are difficult to damage. Easy to Use: Specific net shape to prevent debris from falling when the robotic cleaner is stopped, the extra-large zipper opening makes it easy to empty and clean debris in the filter bag. Easy to remove and install mounting hooks that can be removed for cleaning in seconds. Perfect Fit Premium Velcro Closure This universal filter bag features heavy-duty Velcro closures designed to fit securely to the pipe cleaner and close tightly at the top. A safe and secure closure provides total reliability. How to Replace the Pool Filter Bag Turn off the booster pump and disconnect the hose from the dedicated line of