Two new genuine Blueair Blue Pure F4MAX 411i Max/411a Max OEM replacement filters. These HEPA filters are designed for indoor air quality improvement and are AHAM and CARB certified. The filters are in blue color and come with button control for easy use. Made by Blueair, a trusted brand known for producing high-quality air filtration products, these filters are sourced from China and are lightweight at 1.28 pounds. With a floor area of 30, these replacement filters are a great addition to any home or garden to ensure clean and fresh air.