Molded from halogen-free, self-extinguishing, fiberglass reinforced polyester, NB20 Series withstands extreme temperature and corrosive environments. Enclosures feature fully gasketed lids and stainless steel quick-release latches with padlock hasps, protecting electrical and electronic equipment from water, wind, dust, and chemicals as well as theft and damage. Measuring 20 x 16 x 11 in., units offer 120 Vac powered and non-powered configurations, as well as heating and cooling options.