... customer request: including Oak, Sepele, Elm, Cherry, Teak, etc. Shape: Arc, Straight, Spiral Stair SpecificationsElegant wooden stairs: Raw material: solid woodSize ... customer request: including Oak, Sepele, Elm, Cherry, Teak, etc.Shape: Arc Stair, Straight Stair, Spiral Stair 1. General specification: a. Stringer ...