SCIRA Stairs: Wood,Glass,Acrylic. Banister: Stainless steel. Technical details: SPIRAL STAIRCASE up to 1400mm diameter. Quality spiral stair in wood/stainless steel combination with wooden central column (middle console) dm=114mm. Solid wood stairs 40mm warp free, glued, rounded corners. Radius 6mm incl. banister with round, wooden layer glued handrail 42 mm, produced at one length. Stainless steel support dm 34mm with bolt 14mm to the handrail and joints. SILLER SYSTEM made of stainless steel and connected with 6-7 longitudinal bars dm 10mm. Banister height 1000mm.