20x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack pumps-and-irrigation-supplies thanks to the Smart Pot

thanks to the Smart Pot Tray Liner

which then allows you to spray them for immediate contact kill

Energy Saving up to 50% to an equivalent 2000W HPS light fixture

you can apply this to any part of the plant

it will also increase your plants’ resistance to environmental stresses

20x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack pumps-and-irrigation-supplies thanks to the Smart PotImportant 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