16x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack commercial-greenhouse-fixtures Improves the mass flow of

Improves the mass flow of nutrients within the phloem and improves the translocation of carbohydrates

Grape Leaf Folder (Desmia funeralis)

An attached respirator hood and boots prevent inhalation of toxic chemicals and provide head-to-toe protection

• No need to reapply if it rains after 1-3 days

16x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack commercial-greenhouse-fixtures Improves the mass flow ofImportant 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