... Slab InformationWe supply kinds of our China Black granite and marble,including Mongolian Black,Shanxi Black,China Black,Black auger,G684 and so onProducts rang ... , Honed, Sawn cut, etc.♥.Quality control:Polished degree: Above 85 degree. For black granite, above 90 degree.Tolerance of thickness: +/-2mm 2 ... for 30mm slab, 7-9 bundles in 20' container. Mongolian Black,Shanxi Black,G684 Granite Slab