Pad Refills (Pack of 6 Pads) - 20" x 20" x 2" Quantity:Default Filtering inserts are anti-microbial and

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

This is designed to fit into 1" Return Air Grilles

You may know them as washable air or even permanent air filters

the greater it's resistance to airflow

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

Pad Refills (Pack of 6 Pads) - 20" x 20" x 2" Quantity:Default Filtering inserts are anti-microbial andPACK 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.