square steel tube Thickness: 0.15-3.0mm WT:4.21/4.99/6.56 oiled,galvanized,dip color QC-QA-MTC-SGS-BV-CIQ Square Steel TubeFeatureDimensions10 x 10mm - 600 x 600mmThickness0.6 - 25mmLength2-12m or as requestSteel gradeQ195, Q215, Q235, Fe310, Fe360, St33, St37-2, SS330, SS400, S235, S275, S355, ASTM 1010, ASTM 1017, ASTM 1020StandardManufactured to meet ISO9001, ASTM, API, SAE, DIN, BS, GB and SY ...