Round-based iron spiral stair with steel structure.

Semi-gloss glazed structure,  RAL 9016 finish, total white.

Helix central pole with no visible screws.

External strip with no visible screws.

Iroko solid wood tread, light walnut finish with steel outer frame.

AIR3C banister: 2 satin-finish stainless steel rails, steel handrail, spindles with steel double plate.