NaturalAire SM1006 Cut-to-Fit Synthetic Air Filter, MERV 4, 20 x 30 x 1-Inch, 6-Pack, Color may vary

The Flanders Smilie Cut-to-Fit Synthetic Air Filter is an ideal replacement for any hard to find specialty filters. Easily cut the 20-inch by 30-inch filter to size with shears or a razor knife. This air filter holds its shape and requires no frame support. Simply cut to size and install. It is washable and reusable, maintaining efficiency for up to 1 year. With a MERV (Minimum Efficiency Reporting Value) 4 rating, household dust, pollen, and lint are removed from your air space.