20x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 2 Pack ventilation It works best as a

It works best as a preventative—apply before pests arrive rather than after an infestation is established

* LED Display

ORGANOCIDE™ Plant Doctor Systemic Fungicide (Formerly Exel LG) is an earth-friendly broad spectrum disease control and preventative for use on turf

Patent-Pending Form Factor

1 x Smoke Detector (MBS-SD)

20x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 2 Pack ventilation It works best as aImportant 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