1.Material: natural slate stone 2.Color: black , grey 3.Size:30x20x0.6cm,rectangle shape 4.CE, ... surface Rectangle natural black roofing slate with two holes Optional color: Black, grey, green, dark-greenFinishing: Both sides natural Features: 1 ... , efflorescence proof, heat-resistance and antifreeze, it is widely used in outdoor roofing, paver, and cladding. 3.Size: 30X20CM, 20x60cm, 30x60cm,40x40cm ...