... by the spigot-conical coupling system, it is very popular at market currently, especially at Europe market.Our professional equipments can be widely used ... best quality 2.light weight and high load capacity,and can be used widly to Event, Trade show, Exhibition, Advertise, celebretion ... size match to SU23, SU30, SU35. The circle size can be ordered as clients request.Section: square truss--200*200mm, ...