16x20x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack AIR FILTER BOXES • Low dilution rates (only

• Low dilution rates (only 2-5 ml/gallon)

manufacturing and others require 99

Dual carbon filter

Brassica (Cole) Vegetables

leaving your plants clean and strong

16x20x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack AIR FILTER BOXES • Low dilution rates (onlyImportant 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