Pad Refills (Pack of 6 Pads) - 20 1/8" x 24 3/8" x 1" Quantity:Default The permanent frame is constructed

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

Unlike some permanent custom air filters

We look forward to delivering our American-made

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

Pad Refills (Pack of 6 Pads) - 20 1/8" x 24 3/8" x 1" Quantity:Default The permanent frame is constructedPACK of 6 pads for Pad and Frame Air Filters 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 outlets. Filtering inserts are shipped in an easily stored packet.