𝗖𝗢𝗠𝗣𝗔𝗧𝗜𝗕𝗟𝗘 𝗠𝗢𝗗𝗘𝗟𝗦 - Funmit blue pure 411 filter replacement is specfically designed compatible with Blueair Blue Pure 411, 411 Auto, 411+ and Mini air purifiers. NOTE: This is not OEM product but perfect compatible with Blueair 411 replacement filter. Feel free to ask us if you have any questions, we will unconditionally provide satisfying after-sales service 𝗦𝗨𝗣𝗘𝗥 𝗖𝗥𝗔𝗙𝗧 - Funmit blue air filter replacement with Dual-Layer Filtration is honstructed with advanced material, with higher efficiency and higher low temperature flexibility to ensure a sealed filtration system, high standard, and keep at its best working condition and capacity, automatically improving air quality and promoting better health and well-being for you 𝗛𝗜𝗚𝗛 𝗣𝗘𝗥𝗙𝗢𝗥𝗠𝗔𝗡𝗖𝗘 - Enjoy fresh air all-year-round with Funmit Blue Pure 411 Filter Replacement to ease uncomfortable symptoms caused by problematic air. The High-Efficiency Filter works alongside the Activated Carbon Filter to take out pet dander, hair and absorb unpleasant cooking smells and other VOC's 𝗖𝗢𝗦𝗧-𝗘𝗙𝗙𝗘𝗖𝗧𝗜𝗩𝗘 𝗚𝗢𝗢𝗗𝗦 - Package includes 2 x Blue Pure 411 Filter Replacement (Particel and Activated Carbon Filter). Our blue air filter replacement contains all the required parts to complete the standard installation of your blue air 411 for 360-degree air intake. (Please refer to the picture for details) 𝗥𝗘𝗣𝗟𝗔𝗖𝗘𝗠𝗘𝗡𝗧 𝗥𝗘𝗖𝗬𝗖𝗟𝗘 - We recommend you to replace the 411 filter every 6 months for optimal air flow and performance (depending upon your usage and environment). It is fairly easy to install the filters, no tools required. Simply take out and replace from your machine unit when needed 𝗦𝗛𝗢𝗣 𝗪𝗜𝗧𝗛 𝗖𝗢𝗡𝗙𝗜𝗗𝗘𝗡𝗖𝗘 - Funmit adhere to provide all customers with a simple, streamlined shopping experience of large appliance replacement parts, and prove that we have the highest quality parts and service out there. We stand by our products, and our customers are our focus as a business. If you have any quality problem, please contact Funmit customer service team in time, and we will try our best to solve your problems 2 Pack Blue Pure 411 Filter Replacement Compatible with Blueair Blue Pure 411 Genuine, 411+, 411 Auto and MINI Air Purifiers, Particel and Activated Carbon