450*450mm spigot-type square truss 1.large loading,corrosion resistant ... 3.easy to set up 4.15-25 service year 450*450mm spigot-type square truss Shape:Can be Square / Triangle ... ,289*289mm,389*389mm,400*400mm,450*450mm,500*500mm,520*760mm,600*760 0mm ,450*450 mm ,400*600mm,500*500mm ,500 ... . Kindly please contact me for more details.Mobil no. 13610346332 450*450mm spigot-type square truss