16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack Monterey Lawn & Garden Products Used during the flowering phase

Used during the flowering phase of plant growth with any base fertilizer

and concrete

If you are looking for insect control in your greenhouse

Give your plants a sturdy growing structure with GROW

blended from pure plant oils and extracts

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack Monterey Lawn & Garden Products Used during the flowering phaseImportant 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