spiral wood steel stairs Specification: Stringer: 2x6mm thickness of steel sealed to 30mm thickness; Tread:20mmthicknessofsolidwood Guardrail:8mmdiameterstainlesssteelrailing Handrail: 50mm diameter solid wood Trade terms: Delivery time:35 days after payment Payment term:L/C,T/T,Westion Union,MoneyGram MOQ:1 set Package:wooden box with polyfoam & carton inner protected Just send us yourstairs drawing (note stairs height,stairs length and stairs width)to see how it will fit and look in your home.