The 2 Pack Mini Max Replacement Filter for Blueair Blue Pure Mini Max Air Purifier is a set of rectangular, pleated filters designed for use with Blueair Blue Pure Mini Max air purifiers. These filters, made with HEPA + Activated Filter technology, have a filtration capacity that lasts for 6 months. The pack includes 2 filters, each weighing 6.4 ounces, and is suitable for common applications like appliances. Made in the United States, these white filters are easy to slide into the air purifier, providing clean and fresh air for your home.