16x20x4 (3 5/8) Pleated MERV 10 Air Filters 2 Pack food-storage diluted with at least 100

diluted with at least 100 times amount of water (100-400 gallons/acre)

Completely sealed

to help satisfy a plant's needs

Our pot saucers are so durable that they are intended to be used again-and-again for seasons to come

the pollen kit was put through extensive testing and real-life use to perfect the design

16x20x4 (3 5/8) Pleated MERV 10 Air Filters 2 Pack food-storage diluted with at least 100Important 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 16x20x4 filter