16x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack covid-19 Pyur Scientific Propelyne Glycol USP

Pyur Scientific Propelyne Glycol USP Kosher 5 Gallon

increase nutrient and water uptake

Every material used in its production either meets or exceeds NOP standards

Potassium K+ (ppm)

16x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack covid-19 Pyur Scientific Propelyne Glycol USPImportant 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