Pad Refills (Pack of 6 Pads) - 20" x 20" x 1" Quantity:Default these can be purchased in

these can be purchased in any conceivable size

with each stage capturing progressively smaller particles inside the filter

degrade and restrict air flow

Filtering inserts are shipped in an easily stored packet

Can be ordered in packages of 2 each only

Pad Refills (Pack of 6 Pads) - 20" x 20" x 1" Quantity:Default these can be purchased inPACK 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.