1.[COMPATIBLE MODELS]Premium LV-PUR131 Air Purifier Replacement Filter fully compatible with LEVOIT LV-PUR131 and LV-PUR131S Smart Air Purifier. Please confirm your model before purchase. Filter dimension 13.6 x 1.8 x 11.6 in. 2.[H TRUE HEPA FILTERS]Our LV-PUR131-RF true HEPA filters with a fine preliminary-filter, capable of attaching 99.97% of particles as tiny as 0.3 microns from the air, such as fine dust, pollen, pet dander, lint, hair, fabric fibers, etc. 3.[ACTIVATED CARBON FILTER]This LV-PUR131S Activated Carbon Filter helps attaching common odors from pets, smoking, and cooking. Provides a fresh and clean environment and helps extend HEPA filter life. 4.[-STAGE FILTRATION SYSTEM]The LV-PUR131S air filter made of fine preliminary filter, efficient True Hepa filter and efficient activated carbon filters set, they work together are useful for airborne large particles, absorb unwanted odors. Perfect for improving air quality in your living spaces.