Frame of aluminium alloy used for light box,sign,display 1 For advertising light box 2 Thickness:2.8cm thick ... fram Frame of aluminium alloy used for light box,sign,display: We can offer widest range of aluminium alloy sections of ... alloy , black ,white and any other color various material model:AL-2840, AL-1930, AL-2640, AL-4620,AL-1825, AL-1421 ...