【COMPATIBLE MODELS】: 411 Replacement Filter is Compatible With Blue Pure 411, 411+, MINI, and 411 Auto Air Pu-rifi-ers. PLEASE CHECK YOUR MACHINE MODEL BEFORE PURCHASING 【PREMIUM QUALITY】: NXBHG 411 replacements filter compatible for Blueair Blue Pure 411, 411+, MINI, and 411 Auto is made of premium non-woven fabric and activated carbon, ensuring the filter could be used for long time and proving great puri-fi-cation efficiency for your home, living room, bedroom, office etc. Attaching the dirty particles and bring you fresh ai-r and green life 【2 STAGE FILTRATION SYSTEM】: Our 411 replacement filter compatible for Blue Pure 411 features 2 in 1 filtration system, the white filter efficiently help attaching 99. 97% of ai-rborne particle down to 0.3 microns in size like lint, dust, pet dander. The activated carbon filter perfectly removes cooking smell, pet odors, car exhaust, gases and other harmful VOCs, let you always live in healthy environment 【REPLACE the FILTER EVERY 6-8 MONTHS】: To guarantee you always enjoy the fresh ai-r, we kindly suggest you replace the filter every 6-8 months based on usage to maintain optimum performance of the machine 【EASY TO INSTALL】: You just need to take out the old dirty 411+ replacement filter compatible for blueair and change it with new one and the replacement will be done. No additional tool is needed, really simple 【CONTACT US WITHOUT ANY HESITATION】: NXBHG Store has been specializing in bringing each family freshing air with providing customers premium quality and affordable replacement filter. We highly value customers' shopping experience and If you have any problems while using this replacement filter compatible wtih 411 Auto replacement filter, please contact NXBHG Store customer service team without any hesitation. We are ready to help you to solve problems within 24 hours Blue Air 411 Replacement Filter Compatible with Blueair 411 Genuine, Blue Pure 411+,411 Auto & Mini, Efficient Dust Dander Filter&Odor Smoke Activated Carbon Filter, 1 Cleaning Brush(3 Pack Filters)