20x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack Master Controller Ideal for Poor Soils and

Ideal for Poor Soils and Hydroponics: Perfect for depleted or rocky soils

Built from rugged stainless steel and powered by a 1/8 hp motor

430 Height (in): 5

the user can access all of the settings and alerts on the system from anywhere at anytime

• Contains beneficial photosynthetic microorganisms

20x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack Master Controller Ideal for Poor Soils andImportant 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