Outdoor beige marble stair tread 1.China origin 2.Good quality good price ... 4.Factory since 1985 Part One: Product Info. Product namestairsMaterialGranite , Marble , Basalt, Travertine, SlateColorGrey , Black , Brown , Blue , Green , Red ,Pink ... is availablePatternSpiral, Circular, Straight, ArcFinish Polished and Honed for indoor Flame or sandblasted for outdoorEdge Streight and Beveled, Round , ...