Comparable to Air Purifier HEPA & Activated Carbon -PUR131 Replacement Filter Filter replacement kit includes one (1) HEPA Filter (1) Charcoal based Activated Carbon -filter for Air Purifier -PUR131, Part -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 To replace your the air in your -PUR131 air purifier the steps : 1) With the air purifier off, unplug the air purifier and remove the back cover 2) Remove the old air and properly dispose of 3) Unwrap the . Place the Activated Carbon filter inside the housing first, making the pull tabs are facing the opening 4) Install the True HEPA filter into the housing; make 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"" should now be off Be to also clean the dust sensor on the side of the air purifier using a clean cotton swab When Should I Replace My ,The air 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 -PUR131 colour:Black + white Material:Plastic + sponge Contents: 1 * HEPA Filter 1 * Activated Carbon Filter Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.