About this item: ULTIMATE TOOL AGAINST WILDFIRE SEASON: of wildfire smoke along with extra protection against other wildfire emissions such as 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 surface 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 model]: Suitable for Bruyar Pure411 [ Product Features ]: Filter dust, pollen, hair, and remove odors Color: White Material: polypropylene Package Contents: 2 x Air filter Only the above package content, other are not included. Note: Light reflection 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.