Pad and Frame Air Filter (1 Frame and 6 Pads) - 11 3/8" x 23 3/4" x 1" Quantity:Default with each stage capturing progressively

with each stage capturing progressively smaller particles inside the filter

the greater it's resistance to airflow

You may know them as washable air or even permanent air filters

28X Increased Efficiency

degrade and restrict air flow

Pad and Frame Air Filter (1 Frame and 6 Pads) - 11 3/8" x 23 3/4" x 1" Quantity:Default with each stage capturing progressivelyIncludes one Frame and PACK of 6 pads The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts. The permanent frame is constructed of space age plastics that are resistant to corrosion, oxidation and deterioration. 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