COMPATIBLE REPLACEMENT FILTER FOR Moonbow air purifiers MODEL _AP8400, This is not a Moonbow OEM product and is not covered under any Moonbow manufacturer’s warranty. The Moonbow brand names and logos are the registered trademarks of their respective owners. This is a high-quality replacement part. This filter is absolutely essential for allergy sufferers designed to filter PM 2.5 smoke, dust, pet dander, pollen, mold pores, fabric and other allergen airborne elements.