Product Name:Pre-Galvanized Square Pipes/Hollow Section Material:A53,Q195,Q215,Q235,Q345,16Mn, 20# ... Standard:ASTM A53 ,BS1387 Product Namepre galvanized square pipes/hollow sectionSizeSquare Tube Size:15*15--600*600mmThickness:0.5 ... Ton) or According To The QuantityPort of ShipmentTianjin, ChinaPaymentL/C , T/T Pre-Galvanized Square Pipes/Hollow Section(Zinc Coating80-120g/m2)