Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default Unlike some permanent custom air

Unlike some permanent custom air filters

To find the size the old unit should have sizing information printed on it

these can be purchased in any conceivable size

You never have to hassle with disposable filters that will end up in a landfill again

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default Unlike some permanent custom airPACK 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.