300*300mm spigot-type square truss 1.large loading,corrosion resistant ... costCertification;TUV,CE ISO9001 Size available : 200*200mm,250*250mm ,300*300mm ,350*350mm ,400*400mm ,289*289mm,389*389mm,400 ... . Kindly please contact me for more details.Mobil no. 13610346332 300*300mm spigot-type square truss