20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack veg nutrients 💧 Direct Soil EC Measurement:

💧 Direct Soil EC Measurement: Built-in stainless steel probe penetrates soil for real-time results—skip the lab prep

King size or 1 1/4 size Cones

Product is stable for up to 12 months when stored properly

Digital temperature control

If you want to make a difference in the world

20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack veg nutrients 💧 Direct Soil EC Measurement:Important 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