Accumulair Platinum 17x25x1 (Actual Size) MERV 11 Air Filter/Furnace Filters (6 pack) Actual Size Measures 17 x 25 x 0.75 Each filter lasts up to 3 months Uniform pleat shape enhances dust holding capacity and maximizes air flow Supercharged pleated panel filtering media ideally suited for capturing fine airborne allergens MERV 11 Rating