The S 9000 system’s lift-slide door profiles, covered with aluminium shells, combine the advantages of plastic and aluminium in a single product. The functionality of aluminium and its contemporary look give the building an exceptional outer distinction, while the windows retain all the characteristics of plastic windows, including excellent thermal insulation. The windows and doors covered with aluminium shells are durable and long-lasting. A very large range of aluminium shell colours offers different options to choose the most suitable colour or shade.