Steel Structure Stairs Spec.: Stringer: 114mm diameter keel; Tread: 38mm solid wood; Baluster: 22mm diameter steel; Handrail: 50mm diameter solid wood 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 spairs for more thaneightyears! Just send us yourstairs drawing (note stairs height,stairs length and stairs width)to see how it will fit and look in your home.