Merv 8 Pleated Air Filter - 16 1/2" x 21" x 1" Quantity:12-pack the greater it's resistance to

the greater it's resistance to airflow

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

To order washable electrostatic custom air filters you just need to know the size of the current air filter

Includes one Frame and PACK of 6 pads

They are easy to install with custom air filters made to the sizes that you specify

Merv 8 Pleated Air Filter - 16 1/2" x 21" x 1" Quantity:12-pack the greater it's resistance toAny 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.