To connect two pieces of curved 80mm square extrusion, we produced this extension adaptor, its material is aluminum alloy, its width is 64mm and the thickness is 11mm, customized sizes are available too. This connector includes four screws which can fix it with the curved 80mm square profiles, thus we can make a circle with a bigger diameter. With the idea of "Green Exhibition", all of LT products are environmental-friendly and non-polluting, and they can be reused. By adopting the German standard, the quality of Lingtong’s products is well accepted by European and American markets. Up to now, LT products have already been sold to more than 103 countries all over the world.