Merv 11 Pleated Air Filter - 19 1/2" x 19 1/2" 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

The secret behind the A+2000‰۪s custom air filters performance is the patented stage loading/peak and valley design

the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products

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

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

Merv 11 Pleated Air Filter - 19 1/2" x 19 1/2" 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.