1,aluminum truss,spigot truss, 2,different size 3,light truss,stage truss,build truss 4,long ... (diameter * thickness) 30 * 2mm Single length: 1m, 2m, 3m, 4m,and so on Style:straight frame, round frame, arc frame Color ... glass,toughened glassMax loading: 700kg/square metereasy to set up and remove and moveable different shape stage and fence