Merv 8 Pleated Air Filter - 31 1/8" x 31 1/2" x 2" Quantity:12-pack Then simply add that information

Then simply add that information to our easy to use order form above

This is a 5" MERV 10 HIGH PERFORMANCE AIR FILTER

28X Increased Efficiency

Either way

This is designed to fit into 1" Return Air Grilles

Merv 8 Pleated Air Filter - 31 1/8" x 31 1/2" x 2" Quantity:12-pack Then simply add that informationAny 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.