20x20x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack reflectors and grow lights Eg: Zone A can be

Eg: Zone A can be set to control 465W LED fixtures and Zone B set to control 600W

OMRI listed and NOP approved

Rated at 40

Use Ancient Amber in soil or hydroponics with any nutrient line

20x20x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack reflectors and grow lights Eg: Zone A can beImportant 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