1.Thickness:3mm/4mm. 2.Anti-weathering , anti-noise ,easy installation ,anti-earthquake etc. 1) dimensions of Aluminum Composite Panela) thickness:3mm,4mmb) width ... .1mm,0.12mm,0.15mm,0.2mm,0.3mm,0.4mm,0.45mm,0.5mm 3)features 1) light weight,flat ... ,interior decorationstelephone tooths,vehicle bodies,yachts,industrial usage etc. 3mm Aluminum composite panel use for engraving