We are professional Staircase Manufacture ,Ten years of experience staircase .We can R&D design stairs according to your requirement .Just sent us the detail dimension of the case where the staircase is installed.Excellent quality with suitable price.We can guarantee the the stairs safety,durability,and aesthetics. Material and Dimension 1)Wooden Material:Oak,Beech,Cherry,Rubber Wood,Brich .Others according to your requirement. 2)Steel Material:High-carbon steel,Stainless steel. 3)We can guarantee: The hight of the floor:2300 5000mm, With of the tread:500 1200mm Going:200/225/250mm Various colors can be served according to your requirement.