20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Environmental Controllers durable design of the clear

durable design of the clear 6-inch squares of the lightweight plastic trellis makes installation effortless

The professional choice for growers who require optimal light output

make the PROfilters 45s and 70s ideal for residential filtration

and also preventing unwanted odors or cross-contamination

Gorilla Grow Tent High CFM Kit for GGT1010

20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Environmental Controllers durable design of the clearImportant 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 20x20x4 filter