20x25x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack Lighting Accessories During the lights on cycle

During the lights on cycle

The PHOTOBIO•M multi-bar LED can be applied as a direct 1000W HID alternative or retrofit

Ideal for all water quality testing

These Combos include our T5HO Electronic ballast

That’s why we offer a 5-year warranty on all parts including the refrigeration system–so you can grow with confidence

20x25x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack Lighting Accessories During the lights on cycleImportant 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