Filter-Monster branded replacement filters compatible with Holmes HAPF600 (B Filter) air purifier filter. Filtration removes up to 99.97 percent of airborne particles as small as 0.3 microns in size including dust, pollen, wildfire smoke, pet hair and dander, mold spores, and dust mties. Designed to fit Holmes Mini Tower air purifier models HAP8650B-U, HAP759-TU, HAP9726B-U, HAP9726-U, HAP726-U, HAP756-U, HAP633-U, HAP616B-TU, HAP616-TU. Package contains two (2) replacement filters. Filter-Monster branded replacement filters compatible with Holmes HAPF600 (B Filter) air purifier filter. filtration removes up to 99.97 percent of airborne particles as small as 0.3 microns in size including dust, pollen, wildfire smoke, pet hair and dander, mold spores, and dust mties. Designed to fit Holmes Mini Tower air purifier models HAP8650B-U, HAP759-TU, HAP9726B-U, HAP9726-U, HAP726-U, HAP756-U, HAP633-U, HAP616B-TU, HAP616-TU. Package contains two (2) replacement filters.