Compatibility: HEPA 550 True HEPA Replacement Filter Compatible with AlorAir HEPA 550 Air Scrubber. Value Pack: Includes 4 Pack HEPA 550 Filters True HEPA and activated carbon filter Replacement Filter Only Note: This is not an OEM product. The Brand name and logo are the registered trademarks of their respective owners. Any use of the brand name or model designations for this product is made solely for purpose of demonstrating compatibility!