Genuine Kenmore 85301 Medium HEPA Replacement Filter + Pre-Filter Combo Genuine Kenmore 85301 HEPA filter replacement filter. Fits Kenmore Air Purifier 85300. HEPA filter captures 99.9 percent of particles as small as 0.3 microns including dust, smoke, pollen, pet hair and dander, and mold spores. Reduces development of bacteria, odor, fungi and dust mites. Pre-filter reduces household odors and traps larger particles, extending the life of HEPA filter. Package contains one (1) HEPA filter and two (2) pre-filters.