The three chamber window aluminium system with the structure analogous to Ponzio PT60 system and posses hardware groove. Design of new profiles with groove allows aplication of variety of hardwares and facilitate their assembling. There are possibilities of using hardware for trapezium windows, arch windows, circular, lift-rotable, lift–slidable and antiburglar windows. The width of sashes is 60 – 68 mm, for the frames - 60 mm.