truss corner,aluminium connector, 1.convenient and flexible to use 2.light weight. 3.material:aluminum alloy truss corner,aluminium connector,three way 90degree ... ,light weight,not corrosion2,complete in shape,convenient and flexible to use3,main tube is 50x4mm/50x3mm/50x2mm,vice-tube is ... 32x2mm/25x2mm/20x2mm,hight load capacity,beautiful looks.welcome to contact us.