Staircase made up with 12 treads in plywood natural varnished birch with a depth of 30 mm, adjustable only in height (from 17,2 to 23,3 cm), going of step of 16,3 cm. Two possible configurations: straight (12 treads) or with winder tread (8 straight treads and 4 winder tread treads).Structure and banister in grey lacquered metal. Option: landing balustrade (module of 100 cm)