20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack lighting-&-electrical-components with full performance benefits realized

with full performance benefits realized over the growing season

Nitrogen is critical for forming vegetative matter and supporting abundant growth

• No circling roots

Centurion Pro Machine Plastic Lid for 3

20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack lighting-&-electrical-components with full performance benefits realizedImportant 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