Spiral helical stair, with circular base, realized in shin-painted iron, brown color. Helical central structure, diameter 245 mm, steps wrapped in a band, without junctions in view. Solid oak wood steps, brushed and whitened, 40 mm thick. Railings made of satin-finished stainless steel, composed by handrail diameter 33 mm, vertical two-plate-pillars and two rods diameter 10 mm.