Roofing Slate Black Sheets 1.Passed ASTM&BS680 2.Size 400*200,400*250, ... -9,8-10,9-11,11-13MM Nature Stone Roofing Slate of Black Sheets 1.Natural finish.a little bit rough surfacenice ... P014, rusty S1120, green, greysurface finish: natural, honed, brushed5. Slate Roofing:thickness—3-3.5,4-6,5-7,6-8 ... 20 8412 0625 / Mobile +86 139 2955 1931 Nature Stone Roofing Slate Black Sheets