... /30*30/25*50, etc. 3.Color:black,rust,green,etc 4.factory price black decorative roof stoneItem No: TY7002NAName:multicolor slate ... ; 7-11mm or according to your needsmaterial natural slatecorlor rusty,black,green,pink,gery,etc.usage outside roof decorationport Tianjin or ... 300SM Below mass production pictures and projects FYI: Flat surface high quality black decorative roof stone