Special Building Material / Aluminum Composite Panel /4mm 1.specification: Thickness: 1mm, 2.5mm, 3mm, 4mm, 5mm, 6mm 7mm,8mm,9mm,10mm (3mm and 4mm are most popular).Length: 2, 440mm (Max. Length: 6000mm)Width: 1, 220mm (Max. Width: 2000mm)Weight: 5.5-6kg/sqm baesd on 4mm thicknessThickness of aluminum foil: 0.15mm, 0.18mm, 0.21mm,..