20x20x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack steel plant stake Controllable range from 68 to

Controllable range from 68 to 108 degrees Fahrenheit

For slower growing plants

Btk is highly pest-specific and has little to no impact on non-target organisms

Can be used around pets and wildlife

20x20x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack steel plant stake Controllable range from 68 toImportant 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