16x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 1 Pack refurbished-products you don't have to worry

you don't have to worry

Works in conjunction with all nutrient and feeding programs

The 600W grow lights optimize the grow space and produce the highest $/sq

Loaded with over 80 trace elements

16x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 1 Pack refurbished-products you don't have to worryImportant 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