20x20x4 (3 5/8) Pleated MERV 7 Air Filters 1 Pack New-releases Works great for both hydroponic

Works great for both hydroponic and soil applications

inner diameter hose size

Use & Application

Continuous operation - built to run 24/7

- Min operating pressure 5 psi (opens when pressure drops below 5 psi)

20x20x4 (3 5/8) Pleated MERV 7 Air Filters 1 Pack New-releases Works great for both hydroponicImportant 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