... 0-30.0mmMaterial:Q195,Q215,Q235,Q235B,Q345B Product namesteel square pipesOut diameter10x10~600x600mmWall Thickness1.0-30.0mmMaterialQ195,Q215,Q235, ... we also can packageas customers requirementsPayment termsT/T,L/CUsageStructure pipe in constructions,Bridge,highway,windows of model steel doorbuilding ... facilities etc.Otherspecial design available according to your requirement. ERW Square steel pipe