16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack bio soil extract its food value and

extract its food value and expel the residue as worm castings

you can now still have ample growing space

A duct fan designed to boost airflow in HVAC systems and ventilate home spaces like attics and workshops

EPA Registration Exempt – Exempt from Federal and California EPA registration requirements

– AGGRESSIVE FEEDING/LATE BLOOM: 6 ML – 8 ML PER GALLON

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack bio soil extract its food value andImportant 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