16x20x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack lighting-&-electrical-components Connect to existing ventilation system

Connect to existing ventilation system to distribute throughout room or air exhaust system

runs 70% cooler than HID lights

each monitoring and measuring specific parameters within the nutrient solution

• Full dewaxing without second solvent

allowing you to make the required adjustments quickly and effectively

16x20x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack lighting-&-electrical-components Connect to existing ventilation systemImportant 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