Slate Roofing Tiles 1) Natural Grey Black Rust Slates 2) Various Size and thick 3) Chip Edges with or without install hole 1)Available color: Grey, black, green and rusty 2)Available size: 30*20, 40*20, 40*25, 40*30, 50*25, 30*60cm 3)Thickness: 0.4-0.7cm, 0.5-0.9cm 4) Regular Styles: square, one side round, or one side 1/2 roundSlate is a fine-grained, foliated, homogeneous metamorphic rock ...