Aluminium Composite Panel 1.Thickness:3mm/4mm. 2.Anti-weathering , anti-noise ,easy installation ,anti-earthquake etc ... weight:5.5kg/sqm based on 4mm thicknesse) standard size:1220*2440mmf) qty/20‘fcl:4mm/2380sqm,qty/20‘fcl:3mm/2977sqmg ... 1mm,0.12mm,0.15mm,0.2mm,0.3mm,0.4mm,0.45mm,0.5mm 3)features 1) light weight, ... strong chemical resistance,unique colors can be easily maintained 4mm Exterior Aluminum