20x25x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack Water Treatment Max: 300V / 221° F

Max: 300V / 221° F

Use on established plants as a growth stimulant and ailing plants as a vitality booster

Produces less heat than most competitors

essential elements and supplements

- Made in the USA by people who care

20x25x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack Water Treatment Max: 300V / 221° FImportant 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 20x25x4 filter