20x25x4 (3 5/8) Pleated MERV 8 Air Filters 2 Pack HPS Allows air and water to

Allows air and water to permeate to prevent fungus and diseases

spray nozzle/pressure combinations

Built-in Temperature Cutoff @190F

specifically designed to support a thriving garden

to optimise nutrient availability through the growing system

20x25x4 (3 5/8) Pleated MERV 8 Air Filters 2 Pack HPS Allows air and water toImportant 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