20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack Plant Care/Pest & Disease Control and Bacillus megaterium

and Bacillus megaterium

Convenient diagnostic mode identifies problems early

Parts compatible and interchangeable with the P14-60

General outdoor watering wherever tap water quality is a concern for plants or beneficial organisms

Link up to 8 units from a single power cord

20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack Plant Care/Pest & Disease Control and Bacillus megateriumImportant 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 20x20x4 filter