Merv 8 Pleated Air Filter - 13" x 18" x 1" Quantity:12-pack The filtering media consists of

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

No holes needed for installation in coil area

Produces no ozone or aldehydes

if not you can measure it or check the HVAC unit and the owner‰۪s manual

No screws need

Merv 8 Pleated Air Filter - 13" x 18" 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.