20x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack steel plant stake Works great on tough perennial

Works great on tough perennial weeds after a couple of applications

Extracts heat from the Sunburst reflector

RootTrapperII ensures that the root tips are always branching

handheld operation while taking PPFD measurements & ongoing data logging during power outages

73” | Fits 6” Inline Fans | 800 CFM Maximum | Accepts 12 x 20 x 1” Filters

20x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack steel plant stake Works great on tough perennialImportant 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