Materil: North American red oak, hard maple, poplar. Wooden staircas parts: fittings, handrails, balusters, newels, treads. 1.Product Info Materil: North American red oak, hard maple, poplar. Solid wooden staircase parts: fittings, handrails, balusters, newels, treads.2. Factory View 3. Our Hot Products 4.PackingWelcome to visit our factory.Wish you have a nice day^ ^ Wooden Spiral Staircase