Merv 8 Pleated Air Filter - 29 3/4" x 36" 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

with each stage capturing progressively smaller particles inside the filter

This is designed to fit into 1" Return Air Grilles

precisely designed to prevent flame from penetrating the filters and as the grease laden air passes through the filter is collects the grease

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

Merv 8 Pleated Air Filter - 29 3/4" x 36" 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.