This is a classical spiral stairs with perfect combination of steel and wood. It looks smooth andcan be placed samll space and no need to care much. Living with her, you will totally feel her simpleness, sureness, availability. -Spec. Handrail: Φ50mm beech/PVC/oak Railing: Φ22mm mild steel spindles Stringer: Φ114mm of steel sleeves, Baking varnish or powder coated Treads: 38mm thickness, beech/oak * optionals: shape/material/color Just send us your house floor plan for a free drawing to see how it will fit and look in your home. Xinding supplymany classic designs of stairs supported by steel sleeves for your demand. To help you upstairs step by step on stairs we madeis what we untiringly aspire after.