Certificate in accordance with European Standards EN 1176 by the German TÜV - Product Service.Supporting structure made of tubular galvanized steel section 5x3 cm.Parts list:N°1 platform in support of fiberglass.N°8 seats with a steel frame coated in oven at 180 ° with collars bilaminate HPL brightly colored chairs in birch plywood glued with phenolic film finished and colored with non-slip ribbing.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.