... 10,9-11,11-13MM Nature Stone Roofing Slate of Black Sheets 1.Natural finish.a little ... ,multicolormaterial: slate, quartzite, sandstone, travertineWorkmanship: cemented culture stone, glued culture stone2. Floor Tiles: thickness—10-25mm ... can be with holes6. Slate Irregular Random Stone / Loose Slate Stone:thickness—15-25,25-35,20-50 ... / Mobile +86 139 2955 1931 Nature Stone Roofing Slate Black Sheets