Natural slate has been used as ideal roofing tiles for hundreds of years because of its hardness, lightness, acidproof, waterproof, fireproof, and corrosion-resisting, as well as its beauty of natural colors veins. Available Finishing: both face riven and all edges chipped Available Size: 600x300mm (24"x12") 500x250mm (20"x10") 400x300mm (16"x12") 400x250mm (16"x10") 400x200mm (16"x8") 300x250mm (12"x10") 300x200mm (12"x8") 300x300mm (12"x12") Available Thickness: 4-6mm, 5-7mm, 6-9mm, 8-12mm.