16x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Fertilizer and iron plant supplement designed

and iron plant supplement designed to correct common deficiencies or imbalances in both Vegetative and Flowering phases

Power Supply - Build-in UL Driver

Displays time remaining on cycle

Botrytis Leaf Blight (Botrytis squamosa)*

The dial adjusts the settings and also provides a quick visual confirmation of the current set points with a simple press

16x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Fertilizer and iron plant supplement designedImportant 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 16x20x4 filter