Comparable to LEVOIT Air Purifier HEPA & Activated Carbon LV-PUR131 Replacement Filter Filter replacement kit includes one (1) HEPA Filter and one (1) Charcoal based Activated Carbon Pre-filter for Levoit Air Purifier LV-PUR131, Part LV-PUR131-RF. Captures 99.97% of airborne allergens and contaminants as small as 0.3 microns including pet dander, mold spores, pollen, smoke and dust from the air. Replacing the Air Filters To replace your the air filters in your LV-PUR131 air purifier follow the steps below: 1) With the air purifier off, unplug the air purifier and remove the back cover 2) Remove the old air filters and properly dispose of them 3) Unwrap the air filters. Place the Activated Carbon filter inside the housing first, making sure the pull tabs are facing the opening 4) Install the True HEPA filter into the housing; make sure the pull tabs are facing the opening. 5) Replace the back cover onto the housing 6) Plug in and turn on the air purifier. Use a pen or a pencil to press the black reset button inside the vent on the side of the air purifier. The ""Change Filter"" symbol should now be off Be sure to also clean the dust sensor on the side of the air purifier using a clean cotton swab When Should I Replace My Filters,The air filters can be used for up to 6 months, depending on how often your air purifier is used. Premium compatible HEPA filter replacement set for Levoit Air Purifier LV-PUR131 colour:Black + white Material:Plastic + sponge Package Contents: 1 * HEPA Filter 1 * Activated Carbon Pre Filter