16x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack aaron precise cut accompanied by a

precise cut accompanied by a razor sharp edge that is perfect for harvesting undamaged buds and trichomes

Includes a plastic auger to break through harder soils

and pH up and down additives

No expense spared when producing our high quality ABS plastic reservoirs

and soilless applications

16x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack aaron precise cut accompanied by aImportant 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