Pad Refills (Pack of 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default oxidation and deterioration

oxidation and deterioration

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

some just refer to them as electrostatic filters

Filtering inserts are shipped in an easily stored packet

One way to overcome this problem is to increase the surface area of the filter media

Pad Refills (Pack of 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default oxidation and deteriorationPACK 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.