Pad Refills (Pack of 6 Pads) - 19" x 20" x 1" Quantity:Default than standard fiberglass filters purchased

than standard fiberglass filters purchased at retail outlets

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

This is designed to fit into 1" Return Air Grilles

degrade and restrict air flow

To order washable electrostatic custom air filters you just need to know the size of the current air filter

Pad Refills (Pack of 6 Pads) - 19" x 20" 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.