What is the fine-grained topic of the following text: The Rauvolet shingles, which are laid out in 5 different design lines, including Vetro-Line and Metallic-Line, guarantee quick access with a high freedom of movement and a smooth and silent scroll; they also take advantage of all the technical and functional benefits of Rehau systems by forming components for kitchens, offices, stays or shops. Only return the topic.
Rauvolet Shingles Design and Usage