... Steel square pipe ,square tube ,rectangular steel pipeName:Square pipe ,square tube ,rectangular pipeTechnique:Seamless/welded Specification(mm)From 15 ... 25Length:According to customer's requirementMaterial:Q235,Q345,20#,alloy steel,stainless steelExecutive standard:GB/T3094,6728-2002,ASTM ... construction,sports equipment manufacturingMin.Order Quantity:1ton Black rectangular and Square steel pipe