... x 2,440mm2, Aluminum composite panel thickness: 2, 3, 4, 5 , 6 mm. ( 2mm, 3mm for interior use, ... 4mm, 5mm, 6mm for exterior used) 3, Aluminum alloy sheet thickness: (Al ... : 3mm/1,600 pieces in 20-foot container.Material:1, The front side: aluminum alloy ... fireproof white plastic material3, The back side: aluminum alloy sheet coated with polyester resin primer painting. ...