Certificate in accordance with European Standards EN 1176 by the German TÜV - SÜD. Supporting structure made of tubular galvanized steel section 5x3 cm. Parts list: N°1 platform of support in fiberglass. N°1 with a circular sofa seat and back with five strings made of tubular galvanized steel and painted in the oven to 180 degrees. N°1 in the central stem, phenolic glued birch plywood finished with colored films. The rotation system consists of load bearing rollers. Assembled by 8.8 galvanized steel bolts and nuts. Elements covernut under colored nylon.