16x20x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack CO2 Twister T4 Belt Cover Assembly

Twister T4 Belt Cover Assembly

Fan Size - 4 Inch

transporting the sun’s energy by delivering carbon to plants at robust rates

and 55 gallon drums

Integra Boost 30 Oxygen Scavengers + 1 Oxygen Indicator per barrier bag / 18 bags per box

16x20x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack CO2 Twister T4 Belt Cover AssemblyImportant 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