TRIO 220mm horizontal 120 degree 2-way corner. 32mm Diameter main tube and supplied without couplers. The straight lengths are supplied with couplers, so generally you end up with enough joining parts to form the shape you need, but the coupling sets are available separately, our Code: DE-KITS. Use six of these 120 Degree corners to make a hexagon shape, adding straight lengths to adjust the overall size.