Winix 114090 17WC Air Purifier Filter True-HEPA Filter captures 99.99-Percent of all airborne pollutants as small as 0.3 microns Includes Washable Anti-Bacterial Pre-Filter Includes Washable AOC (Advanced Odor Control) Carbon Filter CleanCel Anti-Microbial Product Protection helps to reduce 99.9-Percent of bacterial growth on filter Fits Winix Air Cleaner Models: P150, WAC9300