... Detailed Product Description Usage: truss is used for hanging speakers and lightsMaterial: hard pressed extruded aluminum alloy6061/6063/6082Each ... *300,400*400,500*600,520*760mm it depends on the loadMain tube: 50*3mm,50*4mmBrace tube:30 ... *3mmConnectionby screw or conical coupleShape: square,triangle, layer,circleSuch stage can be used in exhibition,performance,advertisemt, outdoor celebration,flow ...