... , St52, St42, Q235, Q345, ...Thickness: 0.5 - 2.5 mmSection Shape: SquareOuter Diameter: 15*15-170*170mmPlace of ... WeldedWelded Line Type: LongitudinalWelding Line Type: ERWThickness: 0.5-2.5mmTechnique: WeldedModel Number: ATSM,GB,BSGrade: Q195-Q235Standard: ASTM ... Galvanized Square Tube/PipeSizeW.T15*15--170*1700.5--2.5MMLength 2--12M , according to customers' requirementsInternational Standard ISO ...