... 20cm 3. delivery time: within 15 days. natural slate,natrual stone,slate tile 1. top quality 2. timely delivery 3 ... . excellent carving 4. the whole hearted servicesFlooring slate specification:1) Thickness:9~11mm,11~13mm,13~15mm2 ... ,sawn,honed and polished finish are available.Roofing slate specification:1) Thickness:3~5mm,4~6mm,5 ... 200mm,400*250mm,500*250mm Natural stone black slate tile