16x20x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack growing-accessories Dual Temperature Sensors – Monitor

Dual Temperature Sensors – Monitor temperature in both control zones and trigger overheat protection automatically to safeguard your equipment and plants

Combination of high NPK bio stimulants and bio minerals

Simple As:

controls gnats at different points of their lifecycle

16x20x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack growing-accessories Dual Temperature Sensors – MonitorImportant 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