... iron tube manufacture price Q195-Q235,20#,45#,A53 etc. Size:20x20-400x400mm. TCT:0.3-12.0mm hollow rectangular steel iron ... TechniqueHot rolled,cold rolled,cold drawnStandardBS,ASTM,GB/T,DIN,and etcSurface treatmentBare,oil,galvanized, according to the requirementEnd ... at one lot)6)Loading port:Tianjin,China7)Package: In bundles or according to customers' requirements hollow rectangular steel iron tube