LifeSupplyUSA True HEPA Replacement Filter Fits Winix 114190 Size 21 Complete Set Fits WInix Air Cleaner Models: P300, WAC9500, WAC9000, WAC5000, WAC6300, WAC5500, WAC5300, and WAC5000B. Convenient all-in-one replacement cartridge. Includes Washable Carbon Pre-Filter 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.