20x20x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack Emitters up to and including during

up to and including during harvest

Turf & Surf is ideal soil for both indoor and outdoor growing environments

or indoor potting soil media

CO2 Sensor Type:                               NDIR (Nondispersive Infrared)

1 - (275 ML) of Blast Off

20x20x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack Emitters up to and including duringImportant 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