... section:300x300mm,etc 4.wedding roof truss,lighting truss square screw truss system detail: Truss Material: Aluminium6061-T6 ... tube:(diameter*thickness) 25mmx3mmConnection Mode: Bolt connectionTruss section Shape: square, triangle, layer,circle ,etc.Application:We can design ... stage lighting truss,bolts truss,spigot truss,aluminum stage,glass stage,protable stage,adjustable stage,chorus stage, assembly ...