DUAL was founded in 1995 in Arilje. Over time, the company is developing a tendency of continuous growth: manufacturing facilities, equipment, number of employees and product range. The development company is expanding the market as well as cooperation with a number of customers and suppliers in both Serbia and the former Yugoslavia. Trapezoidal corrugated sheet metal: it is applied in a wide range of construction. It is used as a ceiling, facade and roof sheets. Tinker - gutters: half round gutters made Dual and square pipes and gutters horizontal and vertical in three different widths 33, 400, 500 mm to the desired length. Aluminum walls: is made from aluminum sheet embosiranog or smooth coated in black or white.