20x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack AIR FILTER BOXES Daisy chainable—run 4 fixtures from

Daisy chainable—run 4 fixtures from a single outlet

The Variable Fan Speed Controller enables you to determine precise temperature levels to achieve within your growing environment by way of proper ventilation

ECOWORKS EC is effective against a wide range of pests including spider mites

and upon transplanting

20x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack AIR FILTER BOXES Daisy chainable—run 4 fixtures fromImportant 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