20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack Ventilation Sterile: No

Sterile: No

Unlike many fungicides

Houseflies (Musca domestica)

Grow contains elements which form new compounds with weak electrical bonds

as they cultivate and feed

20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack Ventilation Sterile: NoImportant 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 20x25x4 filter