16x20x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack grow-light-bulbs These fixtures are great for

These fixtures are great for ALL STAGES of the grow cycle

which makes it easy for the plant to produce bigger and better-tasting fruits and vegetables

strains used) can affect results

with instant dilution and no tank mixing agitation needed

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack grow-light-bulbs These fixtures are great forImportant 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