Pad Refills (Pack of 6 Pads) - 12" x 27 3/8" x 3/4" Quantity:Default They are easy to install

They are easy to install with custom air filters made to the sizes that you specify

Unlike some permanent custom air filters

such as dust

One way to overcome this problem is to increase the surface area of the filter media

Filtering inserts are shipped in an easily stored packet

Pad Refills (Pack of 6 Pads) - 12" x 27 3/8" x 3/4" Quantity:Default They are easy to installPACK 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.