... -4m 2.The shapedmore pleasing in appearance 3.Low cost4.Spigot truss: can be Square ,Renctangalar ,Triange .150mm,200mm,250mm,300mm, ... 350mm,400mm series5.The spigot truss size is 150mm*150mm, 200mm*200mm, 300mm*300mm, 350mm*350mm ... indoor exhibition, concert and so on.150mm, 200mm, 250mm, 300mm, spigot truss series: maint tube is 50*2.0mm,the brace tube ...