PLF4CH-23 Pool Filter is compatible with Unicel 4CH-23, Pleatco PFF25TC-P4, PFF25TC-XP4, Filbur FC-2400, Aladdin 12536, Baleen AK-90032, Freeflow Lagas FF-100 CLX Claro, Excel Filters XLS-442. Pls note this is a compatible replacement. Original manufacturers' names and part numbers are for reference only. Yingti's products are made of high-quality materials and high chlorine resistant end caps, which will extend their service life and save money. The filter can be cleaned and reused, and the cleaning frequency depends on your usage. However, when the filter fabric gets dirty or clogged, you need to replace the filter. If you have any question, pls contact us. 4CH-23 Spa Hot Tub Filter Cartridge Replacement - Compatible with PFF25TC-P4, Lifesmart 303263, Filbur FC-2400, Excel XLS-442, Freeflow FF-100 CLX Claro, Aladdin 12536, AK-90032 - Fits 1 1/2" Inch Inlet (2-Pack)