Flexible 5-Stage electrostatic filter. Replaces any existing disposable filter. This filter is "flexible" and its super-slim design works exceptionally well in window / wall mounted units as well as home central air / heat units and returns - These filters are also commonly used in marine / boating and recreational vehicle applications. This permanent filter offers excellent performance, and is warranted for 7 years. Neat Idea!!
[No polyester used in this filter, so cleaning is quick & easy. Filter rinses clean without the clogging]