... 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* ... and so on.150mm, 200mm, 250mm, 300mm, spigot truss series: maint tube is 50*2.0mm,the brace ... tube is 12*2mm.,350mm, 400mm, Spigot truss series:main tube is 50*3.0mm, the brace ...