... ,aluminum truss,spigot truss, 2,different size 3,light truss,stage truss,build truss 4,long history factory,good credit Material ... Type: 4,3,2. Material: Aluminum 606,160,636,082 Head (diameter * thickness): 50 * 3mm Inclined tube (diameter * thickness) 30 * 2mm ... up and remove and moveable 4x6x5m aluminium truss and plywood stage