... :Q195,Q235,10#,20#,A106,A53 best service Specificationsscaffolding steel tube Thickness:1.0-4.0mm Length:6m,5.8m. Material ... :Q195,Q235,10#,20#,A106,A53 TypeScaffolding steel tube/scaffolding tube/scaffold pipeThickness1.0-4.0mmOuter diameter42mm,48mmLengthMax 16metersZinc coated300g,350g ... easy to contact cathy 0086-138-2198-3141 Scaffolding steel tube 18 from factory price!!!