Willstrong® ZCP fr Zinc Composite panel fr Z-Z / 4mm Zinc alloy / 0.5mm Z-A / 4mm Zinc alloy / 0.5mm Aluminum alloy / 0.5mm Zinc alloy: Imported from Europe. Zn-Cu-Ti-Al alloy is consisting of Zn=99.995%, Cu=0.08%~1.0%, Ti=0.06%~0.2%, Al0.015%. Core material: Non-combusitive high quality PE core complies with "Class B" of GB 20286-2006 and "Class 0" of BS476. Shanghai World Expo Willstrong® ZCP fr Expo Axis wall covering (on-going) Quartz zinc grey color 4mm, 0.5mm Z-A skin 5000 m2 Willstrong New Material Holding Co., Ltd. www.willstrong.com.cn Willstrong® ZCP with its natural beauty and environment-friendly concept, plays elegance in such historical and classical projects as museam, opera house, expo, memorial and morden architectural building as well. You can enjoy Willstrong® ZCP's excellence --- extreamly long life-time, from 70 years to 100 years depending on specific environment, self-repairment and higher rigidity, which performs greater added value compared to aluminum composite panel. Non-combusitive material / 3mm Aluminum alloy: 3003/3005 H16, with anti-rust back coating. P1/4