... welding no edgeHDG, powder coated3-4MM tickness street lighting pole 1)Steel materials:Q235 or ss4002)8-15 meters ... Hot-dip galvaniation and powder coating,anti-corrosion,aging resistant5)Pole shape:square and round conical,tubular stepped6)Base plate mounted ... easy maintance 9)Strict control and test measures ensure the high quality These above instructions are for reference only.Color, size, ...