scaffolding hot dip galvanized steel tube 1)material Q235,Q195,Q345 2) size 48.6*2.0mm,48.6*2.3mm 48.6*2.4mm 3)lenght 3M,6M,5 scaffolding hot dip galvanized steel tube material Q235,Q195,Q345tube size 48.6MM*2.0mm,48.6MM*2.3mm 48.6MM*2.4mmlenght 6M,5.8M scaffolding hot dip galvanized steel tube