20x25x4 (3 5/8) Pleated MERV 10 Air Filters 2 Pack growing-accessories These industrial combination pH or

These industrial combination pH or ORP sensors use the conventional measurement technique

Food- and furniture-grade materials

- Used for flowering stages of growth

CMH light blends the perfect amount of wattage and spectrum to get top yield with top quality

(best for thicker oils)

20x25x4 (3 5/8) Pleated MERV 10 Air Filters 2 Pack growing-accessories These industrial combination pH orImportant 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