20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack Nutriants Slowly releases ONA into the

Slowly releases ONA into the air and neutralizes odor on contact

For use in hydroponic

000W DE MH Lamps were designed with the grower’s garden in mind

Commonly controlled insects include whiteflies

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack Nutriants Slowly releases ONA into theImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,