... cert 4,quick delivery constrution use hot dip galvanized square and rectangular steel pipe/SHS/RHS ... 4m, 5.8m, 6m or customized according to your need.4. Surface treatment: bared, galvanized, ... oiled, painted to prevent rust.5. Technique: ERW, hot-rolled6. ... ton12. Delivery time: 10-30 days or according to the customers’ quantity13. Port of shipment: Tianjin Port14 ...