20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack drying-racks Can be used on all

Can be used on all food and feed crops

Re-attach the lid

Adjust and review your CO2 levels when you want to and how you want to

Shipping Weight (unit): 1

EC-to-TDS Conversion Factor: NaCl (avg of 0

20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack drying-racks Can be used on allImportant 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 20x25x4 filter