Function: The foldable design increases the filter area, thickens the filter membrane and has a strong ability to absorb pollution. Scope of delivery: Filters impurities to reduce duo chlorine , giving you clean, fresh water. This is a necessary part for the swollen swimming pool in the summer at home, replacing the old one Pool cleaning filter: The swimming pool filter is a practical choice to replace the old one inflated swimming pool filter which is economical and excellent, providing almost the same service as the original filter at a lower price. Compact size, easy to carry: the swimming pool filter is compact and lightweight, convenient to be used with the inflated pool together, does not take up much storage space, perfect for travel or limited storage space. Scope of application: the upgraded version of the FD2089 inflatable pool filter fits all MSPA models, with push and twist bayonet fitting, which is a necessary part for home summer inflated pool, replacing the old one