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 single length is  0.5  m  to  4m

   4.the truss have many kinds of  specification ;  300*300  to  650*700

   5.good looking, small volunm, low price and easy to set up