20x20x4 (3 5/8) Pleated MERV 8 Air Filters 2 Pack control system increase volumetric moisture content of

increase volumetric moisture content of media

anti-slip handle

controlling pest populations without the need for chemical pesticides

Beneficial microbes do this by bonding with the plant’s roots to break down larger elements into simple chemical components that are easier for uptake and absorption

20x20x4 (3 5/8) Pleated MERV 8 Air Filters 2 Pack control system increase volumetric moisture content ofImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 20x20x4 filter