16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack aaron as the active ingredient

as the active ingredient

Features a built-in battery backup

They are shipped live and ready to destroy pests

Then choose a 3 in Gro-Block

Plants that are grown in hot climates need that extra thirst quench so that they can stay vigorous and not get stressed from drying out

16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack aaron as the active ingredientImportant 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