About this item: ULTIMATE TOOL AGAINST WILDFIRE SEASON: of wildfire smoke along with extra protection against other wildfire emissions such as toxic gasses, smog and odors COMPATIBLE WITH ENTIRE BLUE PURE 411 AIR PURIFIER LINE: 411 Series SmokeBlock Replacement Filter compatible with entire Blue Pure 411 air purifier line consisting of Blue Pure 411 Auto, Blue Pure 411, Blue Pure 411+ air purifiers FILTERS BUILT TO LAST: Using a 360-degree air intake and up to 4x the filter area the Blue Pure 411 Series SmokeBlock Filter lasts on average 6 months; optimizing air flow and performance over time REMOVES EVEN TINIEST AIRBORNE PARTICLES DOWN TO 0.1 : Particle filter removes airborne particles such as pollen, pet dander, , mold, viruses, and dust from your indoor environment TRAPS HOUSEHOLD ODORS: In addition to wildfire emissions, active carbon mesh also traps household odors, smoke, chemicals, and volatile organic compounds (VOC) [Product Name]: Air purifier filter screen [Applicable