1,aluminum truss,spigot truss, 2,different size 3,light truss,stage truss,build truss 4,long history factory,good credit Material size ... 760mm,600*760mm etc.spigot to connect the standard aluminum alloyFrame :4,3,2 Type: 4,3,2. ... 2m,1.2-1.6m,1.6m-2m Frame: aluminum alloyTop floor: can be made by 18mm thickness ... up and remove and moveable aluminium spigot truss foundation,aluminum spigot truss