Square steel tubes Material: Q195,S235JR,16Mn Size: 15*15-600*600mm Thickness: 0.5-16.0mm Square steel tubesMaterial: Q195,S235JR,16Mn etc.Size: 15*15-600*600mmThickness: 0.5-16.0mmIf you have any purchase plan, please do not hesitate to contact with us, look forward to hear from you soon!Contact Person: Jeffson ZMobile: 0086-134 7582 9481 Square Steel Tubes