Comparable to Air Purifier HEPA & Activated Carbon -PUR131 Replacement FilterFilter replacement kit includes one (1) HEPA filter and one (1) carbon-based activated carbon filter for air purifier -PUR131, part -PUR131-RF.Captures 99.97% of airborne allergens and pollutants as small as 0.3 microns, including pet dander, mold spores, pollen, smoke, and dust from the air.To replace the filters in your -PUR131 air purifier, follow these steps:1) With the air purifier turned off, unplug it and remove the back panel.2) Remove the old filters and dispose of them properly.3) Unpack the new filters. Place the carbon filter inside the housing first, ensuring the pull tabs face the opening.4) Install the True HEPA filter into the housing; ensure the pull tabs face the opening.5) Reattach the back panel to 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 \"Replace Filter\" light should now be off. Also, be sure to clean the dust sensor on the side of the air purifier with a clean cotton swab. The 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 air purifier -PUR131Color: Black + whiteMaterial: Plastic + spongePackage Contents:1 * HEPA filter1 * Activated carbon filterOnly 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 allowed error is +/- 1-3cm.