... Standard: according to GB/T 17748-1999 standardMaterial: aluminum alloy sheet coated with fluoro-carbon resin (PVDF) and polyester resin ( ... coating thickness: 28um or 32um ( 3 rollers )Aluminum alloy sheet thickness: 0.1mm, 0.12mm, 0.15mm, 0.2mm, ... 45mm, 0.5mmLight weight, flat surface and high strengthExcellent in heat insulation, sound insulation, fire-resistance, acid-resistance, alkali-resistance, ...