Round-based glass and iron spiral stair with steel structure.
Structure painted with micaceous iron glaze,  609.0400 finish, light grey.
Helix central pole with no visible screws.
External strip with no visible screws.
Layered glass tread, natural etched finish with steel outer frame.
AIR6C INOX banister: 5  satin-finish stainless steel rail, satin-finish  stainless steel handrail, spindles with stainless steel double plate.
Landing step as per drawing.
AIR6C INOX upper balustrade: 5  satin-finish stainless steel rails, satin-finish stainless steel handrail, spindles with satin-finish stainless steel double plate.