Pad Refills (Pack of 6 Pads) - 20" x 20 1/2" x 3/4" Quantity:Default In general

In general

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

Can be ordered in packages of 2 each only

and the greater the pressure drop it creates

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

Pad Refills (Pack of 6 Pads) - 20" x 20 1/2" x 3/4" Quantity:Default In generalPACK 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.