Fits WInix Air Cleaner Models: P300, WAC9500, WAC9000, WAC5000, WAC6300, WAC5500, WAC5300, and WAC5000B. Convenient all-in-one replacement cartridge. Includes Washable Carbon Pre-Filters Any use of the Winix brand name or model designation for this product is made solely for purposes of demonstrating compatibility. Helps effectively filter airborne irritants such as smoke, pollen, dust, mold spores, pet dander and fabric fibers. 4 Stages of air cleaning Removes 99.99% of all airborne pollutants as small as 0.3 microns from the air passing through the filter.