Roto AL Designo is the elegant completely concealed hardware for large and heavy aluminium windows up to 150 kg. It meets the most stringent demands of planners and architects with regard to perfect appearance, functionality and ease of fabrication. Our top model in the aluminium sector is of a modular design based on the proven Roto design principle and can be integrated into almost all Euro-chamber profile systems. Suitable for : - Turn-Only / Tilt&Turn windows with aluminium as the frame material - Sash weights up to 180 kg - Sash height up to 3000 mm - Resistance classes RC 2 and RC 3 - Euro-chamber profile Systems - Special aluminium solutions with Roto Object Business