16x20x4 (3 5/8) Pleated MERV 15 Air Filters 2 Pack chillers-heaters-and-purification Prococo products are sterilized during

Prococo products are sterilized during production

It can be mixed with potting soil

DERIVED FROM: Magnesium Phosphate

See the usage rates below

Nordic Pure 10x30x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

16x20x4 (3 5/8) Pleated MERV 15 Air Filters 2 Pack chillers-heaters-and-purification Prococo products are sterilized duringImportant 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