Practical Pleated Air Filter (2-Pack) - 20" x 23 1/2" x 5" Quantity:Default The filtering media consists of

The filtering media consists of two layers of Stainless Steel roll formed baffles

with each stage capturing progressively smaller particles inside the filter

mold and other fungi

They are constructed from 304 Stainless Steel material formed to exact specifications

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Practical Pleated Air Filter (2-Pack) - 20" x 23 1/2" x 5" Quantity:Default The filtering media consists ofYes, we even have the odd sizes! The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters. In general, the more efficient a filter is at removing particles, the greater it's resistance to airflow, and the greater the pressure drop it creates. One way to overcome this problem is to increase the surface area of the filter media. The "Practical Pleat" contains over 500% greater surface