... .0mmVice tube50*2.0mmDiagonal Tube32*2.0mm*AVAILABLE SHAPE ALUMINUM ROOF OF ROOF TRUSSSquare ,rectangle, triangle, layer, circle, arch, flat* ... Wide use in many situation*WIDE APPLICATION WITH THE ALUMINUM ROOF TRUSSPerformance stage, outdoor and indoor concert, exhibit and display ... with pillar, link sleeve block with beam3.Install the top section with pillar,roll the sling *ADVANTAGE AND COMPETITION ...