NaturalAire 16" x 25" x 1" Pleated Furnace Filter - Quantity 24 Pack of (24) 16" x 25" x 1", NaturalAire Standard Pleated Air Filters 100% Synthetic Wire Backed Media Clay Coated Frame MERV Rating 8 Effective Against Pollen, Dust/Lint, Dust Mites, Pet Dander, Mold, Bacteria, & Virus Carriers.