A system of aluminium profiles with a thermal break designed for external applications. It enables the construction of economically priced sliding doors and windows with a maximum leaf weight of 140 kg. Profiles with a maximum leaf weight of 140 kg. Single-chamber profiles with a leaf depth of 42 mm provide basic thermal insulation. Available in versions with a two- and three-track frame. Due to the numerous variants of frames and adaptation profiles, it is often used on the French market.