16x24x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack grow-systems-trays-reservoirs Both include a 1 year

Both include a 1 year warranty

Directions

Since light is the most important single factor affecting your plants' life cycles

Results can generally be seen within 2-5 days after the first spray

16x24x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack grow-systems-trays-reservoirs Both include a 1 yearNordic Pure Pure Carbon Pleated Odor Reduction MERV 8 Air Filters is made with a durable non woven polyester base media infused with naturally derived charcoal, created to eliminate odors in your office or home. Our pleated design provides three times as much carbon media per A C filter but maintains excellent air flow. Our Pure Carbon air filters are manufactured using a heavy duty, moisture resistant beverage board frame. There is a metal mesh