Aluminium folding door with frame-lattice design. Design depth of 60 mm. Wall thickness of at least 2 mm. Frame profiles are connected to the leaf of a folding door by means of double bolts. Pressed-in aluminium component as a static connecting element. 50 mm finger-pinch protective rubber between the door leaves. Panels made of aluminium or insulating glass. The door leaves are suspended by horizontally-guided roller units and plastic-covered track rollers. The track rollers and door leaves are supported by dust-proof, maintenance-free ball bearings. Adjustable hinges and guide bolts that are 20 mm thick. Covered bolt lock. Creating an opening for people to pass through occurs with no loss in stability. All of the door components can be replaced easily without damaging other components!