Merv 8 Pleated Air Filter - 26 7/8" x 31 7/8" x 1" Quantity:12-pack The permanent frame is constructed

The permanent frame is constructed of space-age plastics that are resistant to corrosion

so it can provide a lifetime of dependable service

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

UL/ULC listed

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

Merv 8 Pleated Air Filter - 26 7/8" x 31 7/8" x 1" Quantity:12-pack The permanent frame is constructedAny Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter.