20x20x4 (3 5/8) Pleated MERV 13 Air Filters 2 Pack Ventilation/Air Conditioning Spray the entire plant with

Spray the entire plant with the light off

and its resistance to crushing

Professionally designed Goliath Grow Tents are ideal for experts and beginners alike

The PowerVEG 633 is one of two red spectrallyfocused lamps designed for fruiting and flowering

20x20x4 (3 5/8) Pleated MERV 13 Air Filters 2 Pack Ventilation/Air Conditioning Spray the entire plant withImportant 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