... .easy to set up 4.15-25 service year 500*500mm spigot-type square truss Shape:Can be Square ... / Layer /Circleusage:We can design diverse shapes to hang audio, speaker, lighting, exhibition shows, outdoor promotion show and so ... *400mm ,289*289mm,389*389mm,400*400mm,450*450mm,500*500mm,520*760mm,600*760 0mm ,450*450 mm ... ,400*600mm,500*500mm ,500*600mm,520*760 mm ,600*760mm and 910* ...