Airteva AC, Furnace Filter With (1) Biosponge Plus Replacement Pad (18 X 24 x 1) Actual Size: 17 3/8 x 23 3/8 x 3/4"

Permanent aluminum frame for durability and a proper air seal BioSponge Plus refill eliminates the filter as a potential breeding ground for micro-organisms and controls airborne germs with its Ageis microbe shield Fits all makes and models of furnaces and air conditioners - any size available 10-year warranty on the filter frame, so you'll always have a filter that fits and performs perfectly Provides maximum protection against airborne contamination 60-day money-back guarantee for your satisfaction Simple to use, with a dual-density design for an extended 60-day filter life