The company operates in three segments: Electric, Manufacturing, and Plastics. The Electric segment produces, transmits, distributes, and sells electric energy in Minnesota, North Dakota, and South Dakota, as well as operates as a participant in the Midcontinent Independent System Operator, Inc. markets. This segment serves approximately 130,000 residential, commercial, industrial, and other customers. The Manufacturing segment stamps, fabricates, welds, paints, and laser cuts metal components for use in the recreational vehicle, agricultural, oil and gas, lawn and garden, industrial equipment, health and fitness, and enclosure industries; and manufactures and fabricates parts for off-road equipment, mining machinery, oil fields and offshore oil rigs, wind industry components, broadcast antennae, and farm equipment, as well as for equipment manufacturers. This segment also manufactures and sells thermoformed products for the horticulture industry; and manufactures products, such as clamshell packing, blister packs, returnable pallets, and handling trays for shipping and storing odd-shaped or difficult-to-handle parts for customers in the consumer products, food packaging, electronics, industrial, medical, and other industries. The Plastics segment manufactures and sells polyvinyl chloride pipes for municipal water, rural water, wastewater, storm drainage system, and other uses. This segment markets its products to wholesalers and distributors through independent sales representatives, company salespersons, and customer service representatives. .