20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack HPS Just add what's required to

Just add what's required to raise pH

no deficiencies

and corded 6-ft power plug cord

translucent poly tank has a built-in backpack-style harness for portable ease of use

Life Cycle: Mated adult females may overwinter in plant crevices or other protected areas if prey is available in the fall

20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack HPS Just add what's required toImportant 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