REHAU Brillant design MDsystem is based on success of system REHAU Brillant design with stop packing. System REHAU Brillant design MD was developed like independent median packing system with the same successful appearance. The most important thing about REHAU Brillant design is its thermal insulation. Very good insulation properties of 70 mm deep profiles and special 5-chambers construction with median packing, make REHAU Brillant design MD stronger.