... Structure Co.,Ltd is a professional 200mm to 400mm conical steel poles manufacturer and factory,Website:http://www.china- ... , we have been exporting high quality 200mm to 400mm conical steel poles made in China for years, welcome to ... HeightFrom 3 meter to 15 meterSuit forAirport, seaport, roadway, etcShapePolygonal, Conical or ColumniformMaterialNormally Q345B/A572, Minimum Yield Strength ≥ 345 N/ ...