Pad Refills (Pack of 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default so it can provide a

so it can provide a lifetime of dependable service

oxidation and deterioration

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

from the air stream

some just refer to them as electrostatic filters

Pad Refills (Pack of 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default so it can provide aPACK 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.