20x25x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Air Purification Ideal for low ceilings/tents/vertical gardens

Ideal for low ceilings/tents/vertical gardens

16" x 20" x 28" in (42 x 51 x 71 cm) Dimensions

Spectrum : 650-665nm

This unique formula provides elevated levels of our proprietary Calcium blend

Double junction probe (not replaceable)

20x25x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Air Purification Ideal for low ceilings/tents/vertical gardensImportant 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