Filtrete 16 in. W X 25 in. H X 4 in. D Pleated 11 MERV Pleated Allergen Air Filter (Pack of 4)As you manage your allergies on a day to day basis, you're looking for options that can help reduce allergens in your air. Filtrete Allergen Reduction filters turn your central heating and cooling system into a whole house air cleaner. With electrostatic technology, these filters help reduce airborne allergens from air passing through the filter. UPC: 076308870911 Manufacturer Part No: NADP01 4IN 4 Pleated: Yes Electrostatic: Yes Filters Pollen: Yes