Merv 8 Pleated Air Filter - 31 1/8" x 31 1/2" x 2" Quantity:12-pack This is a 5" MERV

This is a 5" MERV 10 HIGH PERFORMANCE AIR FILTER

oxidation and deterioration

This is designed to fit into 1" Return Air Grilles

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

some just refer to them as electrostatic filters

Merv 8 Pleated Air Filter - 31 1/8" x 31 1/2" x 2" Quantity:12-pack This is a 5" MERVAny 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.