Prefabricated outdoor spiral staircase with self-supported steps clad in Stone Tiger with a brushed finish. The spiral staircase has a central column made of reinforced concrete, plastered in a bright color in harmony with the colors of the lining of the steps. The stairs is made in a modern-style. Its railing of stainless steel with a polished finish makes it even more simple, decent and elegant. The materials and facings are obtained using innovative techniques to ensure durability of the stairs and weather resistance.