... ,450*450mm,500*600mm, 520*760mm,600*760mm etc.spigot to connect the standard aluminum alloyFrame :4,3,2 Type: 4 ... manufacturer of truss, we design, making-up, setting-up, according to your require, we can design the most suitable truss for ... ,toughened glassMax loading: 700kg/square metereasy to set up and remove and moveable T shape stage,plywood stage ,model show stage,performance stage