21x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage Discontinue use 1-2 weeks prior

Discontinue use 1-2 weeks prior to harvest for best results

Product Features List:-Blocks all light passage-Resists tearing and fraying-Protects against wind

Pure and simple

and a 24-hour timer

Dual airflow direction

21x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage Discontinue use 1-2 weeks priorNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.