The retractable RW40 DUO system, consists of 4 glass-boards, two fixed and another two moving ones. When opening, the moving panes, located in the middle, are slid and positioned behind the fixed panes – so, lifting the upper pane, also moves the lower pane, uncovering half of the opening’s surface, combining highly ergonomic design and smooth glass surfaces. It consists of aluminum columns, 40x80mm in size, in which wire-ropes are places. Size is dependent on each individual project, and all metal parts can be painted in a wide range of RAL colors