20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack grow-light-ballasts Direct replacement for Ona Carbon-Air

Direct replacement for Ona Carbon-Air (ON10052)

tapping the container every sixth tree or plant

The inside of the bag features an odor capturing activated carbon lining protected by a thick nylon mesh

This growing tent is reinforced by its frame’s steel construction

16 Outlet Air Divider Included

20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack grow-light-ballasts Direct replacement for Ona Carbon-AirImportant 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