400*400mm spigot-type square truss 1.large loading,corrosion resistant 2. ... .easy to set up 4.15-25 service year 400*400mm spigot-type square truss Shape:Can be Square / Triangle / Layer ... ,250*250mm ,300*300mm ,350*350mm ,400*400mm ,289*289mm,389*389mm,400*400mm,450*450mm,500*500mm,520*760mm,600*760 ... please contact me for more details.Mobil no. 13610346332 400*400mm spigot-type square truss