Pad Refills (Pack of 6 Pads) - 19 7/8" x 21 1/2" x 1" Quantity:Default than standard fiberglass filters purchased

than standard fiberglass filters purchased at retail outlets

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

such as dust

from the air stream

oxidation and deterioration

Pad Refills (Pack of 6 Pads) - 19 7/8" x 21 1/2" x 1" Quantity:Default than standard fiberglass filters purchasedPACK 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.