Merv 8 Pleated Air Filter - 8 7/8" x 34 5/8" x 1" Quantity:12-pack The filtering media consists of

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

This is designed to fit into 1" Return Air Grilles

No holes needed for installation in coil area

Simply cut a hole

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

Merv 8 Pleated Air Filter - 8 7/8" x 34 5/8" x 1" Quantity:12-pack The filtering media consists ofAny 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.