16x20x4 (3 5/8) Pleated MERV 13 Air Filters 6 Pack soil • No calibration required for

• No calibration required for conductivity and temperature

Inchworms (Paleacrita vernata)

DYNOMYCO mycorrhizal inoculants improve uptake of micro- and macro-nutrients

Included In Box:

16x20x4 (3 5/8) Pleated MERV 13 Air Filters 6 Pack soil • No calibration required 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