... Spigot truss: can be Square ,Renctangalar ,Triange .150mm,200mm,250mm,300mm,350mm,400mm seriesThe spigot truss size is 150mm*150mm, 200mm*200mm, 300mm*300mm, 350mm*350mm, 400mm*400mm,.is very popular in market ... 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 ...