These non metallic class 1 division 2 and class 2 division 2 IR1 fixtures are used for wet areas and areas that are prone to corrosion. They are enclosed and gasketed and meet the Class 1 Division 2 and Class 2 Division 2 standards for dust. These are the most economical versions of Hazardous location fixtures. Most commonly used for: chemical storage areas, hazardous area enclosures, natural gas pumping stations, waste water plants, coal plants, grain storage, industrial applications, ect. Made of Corrosion Resistant Fiberglass Reinforced Body and Acrylic Lens. Come standard in 2 and 3 lamp 4ft. T5 and T8 versions. 120/ 277 volt. Also available in 2 and 3 lamp LED models as well as the New LED Array Strips.