... or before 20 daysSpecifications1:specil design available according to requirement.Black square tube with A53 material 1,mild steel 2,10-15days ... 3,15-15mm-200*200mm 4,ISO.BV.QC certificate Black square tube with A53 materialDimensions:15*15mm -200*200mmThickness:0.6mm- ... :10-15days after depositLoad Port:Tianjin XingangAvailable materials: Q195, Q235, Q345, St33, St37-2, SS330, SS400, ASTM A 106B, ASTM ...