16x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack tents-&-tarps Drop Air produces the humidification

Drop Air produces the humidification you need simply

and completely water-resistant

It can also be used with remote access software* to allow the user to monitor and alter growing conditions remotely from an additional PC or laptop

Plant Doctor prevents and controls a myriad of plant diseases

Ideal for display jars

16x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack tents-&-tarps Drop Air produces the humidificationImportant 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