These are Standard Open Stairways. FEATURES: Used for open Stairways in Industrial Complexes, Fire Stairs, Tanks and other open or unfinished structures Precision injection molded in White Styrene Plastic Ideal for all outdoor or professional models INCLUDES: Two Styrene Plastic Stairs SPECS: Scale: HO (1:100) Height: 9/64" (3.6mm) Width: 25/64" (9.9mm) Length: 5" (125mm) PLS90662