Wing Shing 's 4 mm Exterior Wall Aluminium Composite Panel products are of high quality, protecting the underlying structure from environmental factors such as rain, wind, UV radiation and temperature fluctuations, and they are designed to withstand a variety of conditions, even in harsh weather conditions factors and maintain their appearance over time. 4 mm Exterior Wall Aluminium Composite Panel is durable and corrosion-resistant, suitable for long-term exterior use.