This is three-chamber system for the door. The system has a coplanar structure profiles (notch clearance is 18mm) and the possibility of using glazing beads 24 mm profiled fibreglass reinforced by polyamide strips are applied in Ponzio PE68 system. Specially designed, compatible profiles enable ease of connection between the door and the windows. The structural depth of the frame and leaf is 68 mm. The large number of hardware and door locks can be used. Ponzio PE 68 allows to make as well kneaded as twisted corners. Characteristics of system: Thermal insulation: heat penetration coefficient (of frame) Uf=2,2 W/m2K; Fillings: single or packet window panels with any kind of glass or opaque panels; Surface finishing: powder coating with polyester on chromate undercoater, any RAL colour at choice; anodized in colours: natural aluminium, olive, champagne, gold, brown, lacquered for colour imitated wood; Connecting accessories: corner joints, screws, tap bolts, washers made of aluminium or stainless or galvanized steel.