Pad Refills (Pack of 6 Pads) - 16" x 25" x 3/4" Quantity:Default and the greater the pressure

and the greater the pressure drop it creates

degrade and restrict air flow

Instead of face loading (particles captured on the outer surface of the filter)

with each stage capturing progressively smaller particles inside the filter

Pad Refills (Pack of 6 Pads) - 16" x 25" x 3/4" Quantity:Default and the greater the pressurePACK 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.