16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack bio soil and large scale operations alike

and large scale operations alike

aerating the soil to allow easier root growth and improve water retention

Only apply

NPK  /  3 - 7 - 4

01 mm to 2

16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack bio soil and large scale operations alikeImportant 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