16x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 1 Pack hydro-systems 5-inches Long

5-inches Long

With even more safety features and performance enhancers compared to the 1000w DE lamps

This easy to use concentrate is ideal for controlling and preventing powdery mildew

The integration of ballast and reflector results in a compact fixture

Designed exclusively for Hydrofarm by America's foremost lighting design engineers

16x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 1 Pack hydro-systems 5-inches LongImportant 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