The shutters of the RKS system is a special construction used in the newly-built buildings. The elements of the RKS system provide a fast installation into every type of walls, sure and stable fitting to construction elements of the building and effective thermal and acoustic insulation. Stability of the structure of the boxes is retained thanks to a steel reinforcement and aluminium carriers of the plaster. The box of the RKS shutter is fully installed. Thanks to this, the system can ideally fit in the architectonic concept of the building. Here, we can use all kinds of profiles (PA-39, PA-45, PA-52, PVC-37 or PVC-52) in the entire available color range.