16x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 6 Pack tents-&-tarps never store an electrode in

never store an electrode in distilled or deionized water

Ginormous effectively flips the switch in your plant

and contains zinc

provides a quick knockdown and kill

Easy to clean and is non-corrosive

16x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 6 Pack tents-&-tarps never store an electrode inImportant 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 16x20x4 filter