Ultra Allergen Pleated Furnace Filter, Purple, 17.5 X 23.5 X 1-in.

Ships fast! Rated MERV 11 Color : White Size : 1-Pack 3M Filtrete Ultra Allergen air conditioner and furnace air filters size 17.5x23.5x1 MERV 11 are built to promote better airflow throughout your home, while significantly reducing some of the more harmful airborne contaminants. For up to three months, these filters w