... for road, railway, airport, residence district, seaport, garden, feeding, and husbandry Product features: corrosion resistant, age resistant, sunshine-resistant, weather-resistant ... Opening: 50 x 200, 50 x 100, 50 x 150, and 75 x 100mm Square post: 40 x 60mm, 60 x ... 60mm, 70 x 10mm, 48mm round post Customized designs and specifications are welcome We are a professional manufacturer of galvanized ...