Aluminium Composite Panel is kind of sandwich panel made from non-toxic low density polyethylene ... or nanometer paintFire rate: B2, B1, A2 classSpecification: Panel Thickness: 2mm-6mm, recommend 4mm,5mm,6mmPanel width: ... 1500mmPanel length: as customer's request, maximum 6000mm Aluminium skin thickness: 0.1-0.5mm, recommend 0. ... scratch, Nanometer self-cleaning, special design. aluminum composite panel