3-in-1 true hepa activated carbon air filter replacement with pre filter for holmes aer1 smoke grabber hapf30as-u4r air purifier (4 hepa filters + 4 carbon filters)

Quality air filters: 4 premium 3-in-1 hepa carbon filters with 4 pre filters compatible with holmes and bionaire air purifiers. 3 stages filtration: hepa filters remove up to 99.97 percent of airborne particles as small as 0.3 microns. activated carbon eliminates smoke and other household odors from cooking, pet and chemical. preliminary filter in fiber to capture large particles such as hair, dust and debris. carbon pre filter: another layer of protection to prevent any hair, dust etc from entering the filter. it also removes any unflavorable houshold odor. compatible with holmes air purifiers: usable with the following holmes units: hap242-nuc, hapf300ah-u4r, hapf30at-u4r, cap531-u, cap529-u, hap240, hap242, hap412, hap422, hap424, hap706, hap716, hap9240, hap9242, hap9412, hap9414, hap9422 and hap9424. bionaire compatible: can be used with the following bionaire units: bap260, bap815, bap825, bap9200, bap9700 and bap520. size: 1.2 x 10 x 4.6 inches. quality meets or exceeds leading national brand's