New and sealedThe 3M Filtrete MPR 1900 4-inch Allergen Bacteria and Virus Air Filter is a high-quality pleated filter with a MERV rating of 13 designed to effectively capture airborne particles such as allergens bacteria and viruses. With a filter life of 12 months and made with synthetic filter media this filter provides efficient filtration for air purifiers air conditioners and furnaces. The filter frame is made of plastic and it utilizes electrostatic filtration technology to enhance its filtering capabilities. This filter is an essential component in maintaining clean and healthy indoor air quality in your home.