We have four production lines in China and two lines in Russia. Branch offices and showrooms have been built in big different cities such like Beijing, Shanghai, and Chongqing. Our standard size is 1220mm(width)*2440mm(length). Also the width can reach to 1550mm if you need. The normal total thickness is 3mm and 4mm. Usually, 3mm is used inside and 4mm is used outside. But there are many different thickness about skin aluminium:0.12mm,0.15mm,0.18mm,0.21mm,0.30mm,0.35mm,0.40mm,0.45mm,0.50mm.