light truss, square truss, bolt truss with TUV material: 6082 the main tube 50*3mm, the vice tube 25*2m 1. light truss, ... alluminum alloy,trussing, conpact,good-looking 2.the main tube ... is 50mm*3mm and the vice tube is 25mm*2mm 3.used 6082 the ... volunm, low price and easy to set up aluinium square light truss