Item Type: Air Purifier Filter Element Material: PP, PET, activated carbon Compatible with for LEVOIT Vital 100, part number is Vital 100-RF Package List 2 x Air Purifier Filter Element You should change the filter at least every six months. (more often in households with children, animals or smokers) 1POLLUTION REMOVAL: Remove 99.97% of large particles and airborne particles including dust, common pollutants, carbon layer, reduce chemicals VOCs, tobacco smoke, common household odors 2REPLACEMENT FILTER SET: Air purifier filter element contain 2 high efficiency 3 in 1 for TRUE HEPA filters 3HIGH EFFICIENCY: Come with high filtration efficiency because the air passes through the filter evenly, very practical 4STRONG ADSORPTION MATERIAL: Using PP, PET, activated carbon material, purifies air, eliminates odor, and has strong adsorption capacity 5REPLACEMENT MODEL: Part number is Vital 100 RF, compatible with for LEVOIT Vital 100, fit can be used