The superposed SD18 system consists of a perimetrical aluminum profile, in which three glass-boards are slid along. The system enables the opening panes to slide in both horizontal directions. The triple track guide is 18x19mm in size, while the glass clamping profiles are 50mm in size. The system works with 10mm glazing, on which handles of the user’s choosing are installed. Thin, 14mm aluminum profiles with sockets which support brushes are installed on the vertical sides of the glass-boards. The aluminum profiles come in natural anodization, stainless steel imitation, or can be electrostatically painted in wide range of colors.