16x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 6 Pack shoe-cover high quality coco coir and

high quality coco coir and Vermicrop's own CocoNot

The swivel head bolt and nylon-padded nut ensure smooth and lasting operation

Debug ON attacks and controls in four different ways:

• The only T5 grow lamp made in the USA

Helps plants fight disease & promotes drought/salinity resilience

16x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 6 Pack shoe-cover high quality coco coir 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 16x20x4 filter