NaturalAire SM1006 Air Filter 20 in L

Up to MERV rating 4. Lasts up to 1 year. Effective against pollen, dust mites, dust/lint, mold. 20″ x 30″ x 1″ Naturalaire furnace filter Cut to fit with natural fibers, washable, needs no frame Up to MERV rating 4 Lasts up to 1 year Effective against pollen, dust mites, dust/lint, mold.