20x25x4 (3 5/8) Pleated MERV 8 Air Filters 1 Pack spl_hrg and vegetate your plants up

and vegetate your plants up to nearly 2′ in height

Includes: water-resistant

It can be mixed with potting soil

Exhaust fans with high CFM ratings can create too much negative air pressure that the canvas walls flex inward

- Heavy Duty Brass Grommets

20x25x4 (3 5/8) Pleated MERV 8 Air Filters 1 Pack spl_hrg and vegetate your plants upImportant 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