... , special suitable exterior curtain wall cladding, exterior reformation for old buildings, funitures, signboard,balcony. Specifications:Panel thickness:3mm,4mm,6mmAluminum thickness ... 1220mm*2440mm*4mmColor: Twenty seven colors of aluminum composite panel for customer’s option, the customized color is available.Characristics ... gloss retention in a long time. Aluminum Composite Panel for exterior wall