20x24x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack eligible-for-discount • Very strong photosynthetic action

• Very strong photosynthetic action

containing a combination of highly active organic acids

provide superior air circulation

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(50) Exclusive Flip-Top Culture Vials w/ 10" x 20" Tray

20x24x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack eligible-for-discount • Very strong photosynthetic actionNordic Pure 20x24x4 Pleated Air Filters MERV 7 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a heavy duty, moisture resistant beverage