20x25x4 (3 5/8) Pleated MERV 15 Air Filters 6 Pack hydro-systems The inside of the bag

The inside of the bag features an odor capturing activated carbon lining protected by a thick nylon mesh

replacing the single junction used in the past

Will Power Vegetative Grow Formula contains a blend of potent

and other processes

recommended by experts for many plant types

20x25x4 (3 5/8) Pleated MERV 15 Air Filters 6 Pack hydro-systems The inside of the bagImportant 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