Stringer: Boxed and reinforced steel stringer laterally fitted to the treads
Closed risers: Optional
Stair railing: Characterised by tempered and layered glass directly and laterally fitted to the steps with apposite round stainless steel bolts, and these bolts can be covered with optional wooden caps. The glass shape on the bottom edge can be straight or step shaped (glass corners can have different radius according to the bottom polishing)