UL listed and CSA certified
Industrial grade carbon steel alloy
6" outside to outside measurement caliper legs
We are committed to excellence
FILTER 20 X 25 X 1 NATURALAIRE M13 Rotary UL listed and CSA certifiedMERV 13. The top tier of filters for contaminant removal in residential retail air filters. Also for application in general surgery, hospitals, and health care facilities. Up to 90 days effective against pollen, pet dander, dust mites, dust and lint, smoke, mold, smog, bacteria, virus carriers, microscopic allergens, oil, smoke, and lead dust. Electrostatically charged. Wire backed media.