Merv 8 Pleated Air Filter - 18" x 34" x 1" Quantity:12-pack And there are no metal

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

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

Eliminates Filter Bypass

They are easy to install with custom air filters made to the sizes that you specify

some just refer to them as electrostatic filters

Merv 8 Pleated Air Filter - 18" x 34" x 1" Quantity:12-pack And there are no metalAny 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.