20x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 12 Pack Garden Hygiene and Safety Durability & Odor Layers: These

Durability & Odor Layers: These two layers help guarantee maximum puncture-resistance during packaging and transport

Sulfate (SO4)

Lettuce Drop (Sclerotinia sp)

sturdy domes accommodate larger plants for increased growing volume

4 outlets controlled by mechanical timer with 15 minute on/off increments

20x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 12 Pack Garden Hygiene and Safety Durability & Odor Layers: TheseNordic 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.