Pad Refills (Pack of 6 Pads) - 23 1/2" x 25 1/2" x 1" Quantity:Default these can be purchased in

these can be purchased in any conceivable size

so it can provide a lifetime of dependable service

This is designed to fit into 1" Return Air Grilles

and the greater the pressure drop it creates

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

Pad Refills (Pack of 6 Pads) - 23 1/2" x 25 1/2" 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.