Comparable to LEVOIT HEPA Air Purifier and Activated Carbon LV-PUR131 Replacement Filter Filter Replacement Kit Includes One (1) HEPA Filter and One (1) Carbon-Based Activated Carbon Pre-Filter for Levoit Air Purifier LV-PUR131, Part LV-PUR131-RF .Captures 99.97% of allergens and airborne pollutants as small as 0.3 microns, including pet dander, mold spores, pollen, smoke and air dust. Replacing Air Filters To replace the air filters on the LV-PUR131 air purifier, follow the steps below: 1) After turning off the air purifier, unplug the air purifier and remove the back cover 2) Remove the old air filters and dispose of them properly 3) Unpack the new air filters. First, place the activated carbon filter inside the housing, making sure the tabs are facing the opening 4) Install the real HEPA filter into the housing; Make sure the tabs are facing the opening.5) Replace the back cover with the housing.6) Plug in and turn on the air purifier. Use a pen or pencil to press the black reset button inside the vent on the side of the air purifier. The "change filter" symbol should now be turned off, remember to also clean the dust sensor on the side of the air purifier with a clean cotton swab, when should I replace the filters, air filters can be used for up to 6 months, depending on how air purifier is often used. Premium compatible HEPA filter replacement kit for Levoit air purifier LV-PUR131 Color: black + white Material: plastic + sponge Package contents: 1 * HEPA filter 1 * activated carbon pre-filter Only the above package content, other products are not included. Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement error is +/- 1-3cm.