TSSB is representing products here for export. HT-220 horizontal close type sliding window system. Titen 4 is a horizontal close type sliding window system with Airtightness[m2/(h·m2)] 0.00/ heat transmission coefficient [W/(m2·K)] 0.656, Allowing ventilation in a closed state. Titen 4 is also a new concept window with High insulation, high airtightness, high watertightness and excellent security performance.