... roughly polished 2) Color : Black Material:Slate Tray , Slate Serving Tray ,Stone Slate TrayMachine cut regular edge, or ... cm)Width(cm)Thickness(cm)Rectangle30200.8Rectangle35250.8Rectangle with round corners40250.8Square10/15/20/25/30cm10/15 ... 25/30cm0.8RoundDiameter 10cm,15cm,20cm,30cm0.8Tray with drilling holes40300.8Note special sizes and shapes are ... us for more details. Black Slate Tray with glass