Filters provide safe, clear, pure water to inspire the greatest sense of well-being.Enjoy a unique moment in your spa. Length: 34.5cm;Outer diameter: 5 inches;Top: handle;Bottom: 2" female thread. The PLF4CH-949 spa filter is compatible with PWW50L, Unicel 4CH-949, Baleen AK-90091, Magnum O250, Darlly 42522, Excel Filter XLS-479. The trilobal fabric filter material makes it easier to remove contaminants when cleaning the filter, and the filter is as good as new after cleaning.It is recommended to clean the cartridges every two weeks to optimize the performance of the spa. The fabric is less clean than traditional fabrics.The filter effectively removes hair, leaves, dirt, debris, sand and more.Enjoy some clean relaxation time in the spa and jacuzzi. The unique three-leaf filter structure makes it easy to capture a large portion of the core.The improved filter is also easy to wash and clean.