Merv 13 Pleated Air Filter - 25" x 25" x 1" Quantity:12-pack the greater it's resistance to

the greater it's resistance to airflow

the A+2000 uses no foam that may clog

Includes one Frame and PACK of 6 pads

This design enables A+2000 custom air filters to maintain performance over the years

Merv 13 Pleated Air Filter - 25" x 25" 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.