... galvanized square and rectangular steel pipe/SHS/RHS 1. Outer diameter:20*20-400*400mm2. Thickness: 0.5-25mm3. Length: 4m, 5.8m ... -rolled6. Certification: CE, ISO7. Material: Q195, Q235, Q345(16Mn), ST37, 20#, Q390, X42-X65, H40, J55, S290-S555, STK500, S235JRH S275JOH ... packing seaworthy polypropylene cases.16. The main products big outer diameter and thick square steel tube have filled the blank of ...