Driven by internal spring, up and down at will. The tube of large diameter (32 mm) and finish make this bar the favorite of the highest institutions of Europe. Available in two sizes 76 cm and 55 cm long. The hinged bar length of 76 cm. (AD506LUX) is designed for toilets that incorporate backpack and 55 cm bar. (AD505LUX) wc is for those that do not incorporate the backpack, either because this is recessed or supendida. Plate to the wall: 13 x 30 cm, 6 screws (not included)..