European certified 304 aluminum alloy, sturdy and durable, resistant to wind, rain, and corrosion. More than 20 years of average use.European certified 304 aluminum alloy, sturdy and durable, resistant to wind, rain, and corrosion. More than 20 years of average use.European certified 304 aluminum alloy, sturdy and durable, resistant to wind, rain, and corrosion. More than 20 years of average use.European certified 304 aluminum alloy, sturdy and durable, resistant to wind, rain, and corrosion. More than 20 years of