13x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 12 Pack Grow Light Reflectors S4 Spectrum: Provides highly efficient

S4 Spectrum: Provides highly efficient full spectrum with a healthy red-to-blue ratio to drive photosynthesis

2 inches thick and designed for close-proximity deployment just five inches from top of canopy

conductivity (EC)

5-gallon container

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13x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 12 Pack Grow Light Reflectors S4 Spectrum: Provides highly efficientNordic 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.