modular wood steel staircase Spec.: Stringer: 8mm thickness of steel Tread: 38mm thickness solid wood Guardrail: 8mm diameter stainless steel railing Handrail: 38mm diameter stainless steel Trade terms: Delivery time:20 days after payment Payment term:L/C,T/T,Westion Union,MoneyGram MOQ:1 set Package:wooden box with polyfoam & carton inner protected We have done staircase foreight years! Just send us yourstairs drawing (note stairs height,stairs length and stairs width)to see how it will fit and look in your home.