NaturalAire SM1006 Cut-to-Fit Air Filter, 20 in L, 30 in W, 4 MERV, Naturalaire, Mfr#: SM1006

The Smilie cut-to-fit filter is a replacement air filter that can be sized for different heating, cooling systems with shears or a utility knife. It is washable and reusable, giving you an efficient service life for up to one year.