Wonderful metal helical staircase for private residence in London for private client. Over 270 degrees, 1.4 wide at the base, finishing 1m at the top. Polished curved marble treads on semi curved stairs. Special curved toughened glass balustrade topped with polished stainless steel handrail, finished with fibrous plaster soffit. The mixture of glass, marble and stainless steel reflect of each other to give a pleasant bright outlook to the room.