20x25x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack soil nutruient Keep your water filtration in

Keep your water filtration in tip top shape by replacing your carbon filter as needed

The HR-F increases tying efficiency by 3 times

Pyrethrin and Permethrin free

Do NOT store diluted or after nutrients have been mixed with water

At the heart of both these systems is the new and improved PHB4030 Phantom Commercial DE Ballast with USB Interface

20x25x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack soil nutruient Keep your water filtration inImportant 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 20x25x4 filter