Pad and Frame Air Filter (1 Frame and 6 Pads) - 20 3/4" x 22 1/4" x 1" Quantity:Default And there are no metal

And there are no metal parts that could lead to corrosion or oxidation within the filter

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

Filtering inserts are anti-microbial and are more efficient in capturing particles

Either way

We can make custom air filters in heights and widths ranking from 6 inches to 36 7/8 inches with increments in 8ths of an inch

Pad and Frame Air Filter (1 Frame and 6 Pads) - 20 3/4" x 22 1/4" x 1" Quantity:Default And there are no metalIncludes 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