16x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack Grow1 5' Steel Stake Bio-NRG Bloom-C encourages beautiful and

Bio-NRG Bloom-C encourages beautiful and bountiful blooms

and Ascophyllum nodosum

so you can work comfortably and move easier

and beneficial insects — highly target-specific with no known impact on non-target organisms

as the earthworms burrow

16x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack Grow1 5' Steel Stake Bio-NRG Bloom-C encourages beautiful 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 16x20x4 filter