20x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack ph-ec-tds-meters-and-solutions Trichogramma minutum is a moth

Trichogramma minutum is a moth egg parasite native to the eastern parts of the United States

Pumping raw air into the nutrient solution

Single use only

and fish aquarium water

For all foliar applications of specific crops

20x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack ph-ec-tds-meters-and-solutions Trichogramma minutum is a mothImportant 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