20x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack CO2 Includes raised platform insert and

Includes raised platform insert and capillary matting allowing plants to self water for up to 14 days (subject to climate conditions)

Comes equipped with a 1/2" inlet and 3/8" outlet

Set timer for day time only

Inoculate seedlings and established vegetative plants with the highest CFU’s on the market

20x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack CO2 Includes raised platform insert andImportant 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