Pad and Frame Air Filter (1 Frame and 6 Pads) - 21 1/2" x 21 3/4" x 3/4" Quantity:Default The permanent frame is constructed

The permanent frame is constructed of space-age plastics that are resistant to corrosion

Instead of face loading (particles captured on the outer surface of the filter)

viruses and mold

To order washable electrostatic custom air filters you just need to know the size of the current air filter

Includes one Frame and PACK of 6 pads

Pad and Frame Air Filter (1 Frame and 6 Pads) - 21 1/2" x 21 3/4" x 3/4" Quantity:Default The permanent frame is constructedIncludes one Frame and PACK of 6 pads The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts. The permanent frame is constructed of space age plastics that are resistant to corrosion, oxidation and deterioration. Filtering inserts are anti microbial and are more efficient in capturing particles, such as dust, ragweed, pollen, etc., from the air stream, than standard fiberglass filters purchased at retail