... 3,different size 4,have a long history light truss.store truss,exhibition trussMaterial size details: 150*150mm,200 * 200mm,300 ... *300mm, 400*400mm ,300*400mm etc.screw to connect the standard aluminum alloyFrame :4,3,2Type: 4,3,2.Material ... -up, setting-up, according to your require, we can design the most suitable truss for you. If you are interested in ...