Xinding supply several classic designs of stairs supported by steel stringer for your demand. Spec.: Width: 800mm-1000mm Stringer: 80mm*120mm quadrate steel and support Handrail: Φ50mm beech Baluster: 8mm*40mm flat s.steel Railing: 10mm toughened glass Treads: 38mm thickness, beech * Optional: hardwood types (beech, walnut, oak, teak, cherry, mahogany...) this design is available straight/L/U/Z Available in many shapes and wideths to accomodate your needs. Send us your house floor plan or photos for a free drawing to see how it will fit and look in your home. To help you upstairs step by step on our staircase is what we untiringly aspire after.