Practical Pleated Air Filter (2-Pack) - 12" x 12" x 5" Quantity:Default with each stage capturing progressively

with each stage capturing progressively smaller particles inside the filter

PACK of 6 pads for Pad and Frame Air Filters

Any Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop

And there are no metal parts that could lead to corrosion or oxidation within the filter

Practical Pleated Air Filter (2-Pack) - 12" x 12" x 5" Quantity:Default with each stage capturing progressivelyYes, 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