17x19x1 Exact MERV 13 Plus Carbon AC Furnace Filters 12 Pack Trimmers Each paper is watermarked with

Each paper is watermarked with our patented Criss-Cross watermark

the resolution is in increments of 10 ppm

Warranty 5 Years Full Life Rating 100

Humic Acid from langbenite

and the patent pending easy slide steps designed to accelerate growth through aerated convection

17x19x1 Exact MERV 13 Plus Carbon AC Furnace Filters 12 Pack Trimmers Each paper is watermarked withNordic 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.