16x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack spl_spectrumking 2 tricoderma species and 17

2 tricoderma species and 17 bacterial species well suited to a variety of soils

eliminating concerns over whether you've got afternoon-facing light or a climate that supports your preferred greenery

or shop displays when wanting to keep roses from opening prematurely

In effect it defies gravity

Keep food fresh up to 5 times longer

16x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack spl_spectrumking 2 tricoderma species and 17Important 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