... Natural, Material Type: Black Square Slate Dish (Square Slate Dish,Slate Board)1.Resistant to Acid ... and pollutants 2.Thickness: 4-6mm,5-7mm,6-8mm,7-9mm 3.Size ... available. 3.Standard Size: 30X30CM ,25X25CM,20X20CM 4.Usage of Slate: Plate,Dish,Cheese Board,Sushi ... Set,Table ware,Dinnerware,Hotel ware. 5.Packaging: Standard size: 16pcs ...