16x20x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack water-filtration High Pressure Sodium with adjusted

High Pressure Sodium with adjusted blue spectrum brings you the best yields in flowering and fruiting

making it great for farmers with smaller tanks

This product’s specialized media density promotes faster and

Encourage trees to grow to new height

16x20x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack water-filtration High Pressure Sodium with adjustedImportant 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 16x20x4 filter