This FLT5000 Air Purifier Cartridge Replacement is designed for AC5000 AC5000E AC5250PT and AC5300 series air purifiers and is especially suitable for homes with pets. The cartridge set includes 2 True HEPA filters and 4 activated carbon pre-filters to fully purify the air of pollutants.The True HEPA filters capture 99.97% of particles as small as 0.3 microns such as dust pollen mold spores pet dander and allergens while the activated carbon pre-filters are effective in adsorbing odors smoke and volatile organic compounds (VOCs) which are especially suitable for dealing with pets. ) which is particularly suitable for dealing with odor and hair problems from pets. With easy installation and superior performance this cartridge kit can significantly improve the operating efficiency of your air purifier providing you and your family with a fresher healthier indoor air environment. Size: 19.52 x 4.75.