16x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack Cone Filler they consistently provide intense light

they consistently provide intense light in a combined spectral range perfect for both vegetative and flowering/fruiting growth

Hoods include ties in the back to keep tie strings out of the way while you work

offering flexibility for all types of growers

Automated filter change warning

16x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack Cone Filler they consistently provide intense lightImportant 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