1) Standard: according to GB/T 17748-1999 standard 2) Material: a) Front: aluminum alloy sheet coated with fluoro-carbon resin (PVDF) and polyester resin (PE) roasting painting .b) Core: nontoxic polyethylene c) Back: aluminum alloy sheet coated with polyester resin painting d) Surface finish: treated with PVDF and PE resin rolling roasting coating e) Surface coating thickness: 30um f) Aluminum alloy sheet thickness: 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.45mm, 0.5mm.3) Dimensions: a) Thickness: 3mm, 4mm b) Width: 1220mm 1500mmc) Length: 2440mm, 3200mm, 4000mm,5000mm (max: 6 meter) d) Weight: 5.5kg/sqm based _disibledevent="on">4mm thickness e) Standard size: 1220 x 2440mm f) Nonstandard sizes are available according to requirement