Merv 8 Pleated Air Filter - 17" x 21" x 1" Quantity:4-pack PLEASE NOTE: Dimensions listed are

PLEASE NOTE: Dimensions listed are HxWxD

We look forward to delivering our American-made

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

This is a 5" MERV 10 HIGH PERFORMANCE AIR FILTER

This is designed to fit into 1" Return Air Grilles

Merv 8 Pleated Air Filter - 17" x 21" x 1" Quantity:4-pack PLEASE NOTE: Dimensions listed areAny 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.