20x25x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack AIR FILTER BOXES CocoPro™ cubes contain thoroughly washed

CocoPro™ cubes contain thoroughly washed and buffered coco fiber

providing a base to keep the meter upright for hands-free measurements

000 gallons US) of nutrient solution

one application weekly

Operates on a 120/240/277v power supply

20x25x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack AIR FILTER BOXES CocoPro™ cubes contain thoroughly washedImportant 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