1.Standard: ASTM, DIN,JIS,GB,EN 3.WT.:0.8-25mm 4.O.D.:10-500mm 5.High quality,quick delivery ,low price Specification:High quality square steel pipe Square steel pipeCommoditySquare steel pipeStandardsGB/T3524, GB/T8164, GB3091MaterialQ195B ,Q235B,Q215,Q235,16Mn,etc.Specification10*10-500*500mmWall Thickness0.8-25mmLength5.8m,6m or as per your requiredStructurewelded or seamlessSurface ...