20x25x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 6 Pack spl_ps CO2 outlets are automatically disabled

CO2 outlets are automatically disabled while your ventilation equipment is functioning

Adjust-a-drive motor w/6' rail plus mounting hardware

and overall plant vitality with precision-balanced nutrition

and ventilation systems

3ft Grow Tent(1680D Canvas)

20x25x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 6 Pack spl_ps CO2 outlets are automatically disabledImportant 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 20x25x4 filter