Exterior material Slate Stone Ladder/Stair 1.SGS,ISO,ASTM,BS,EN 2.Slate ... 3.Finish;Honed,Natural 4.Hot Exterior material Slate Stone Ladder/StairA bold palette of rustic , black ,purple, grey, green, ... yellow and pink real stones with a textured, naturally slip-resistant surface are all available ; Rain ... one-of-a-kind style Exterior material Slate Stone Ladder/Stair