... restaurants and apartments Other kinds of buildings as an ideal decorative materials for interior and exterior of buildingDecoration of ... 440mm2, Aluminum composite panel thickness: 2, 3, 4, 5 , 6 mm. ( 2mm, 3mm for interior use, 4mm, 5mm, 6mm for exterior used ... 2, Core: nontoxic polyethylene. low denisty , fireproof white plastic material3, The back side: aluminum alloy sheet coated with polyester ...