Slate with low water absorption, easy installation, good acid resistance, efflorescence proof, heat-resistance and antifreeze, it is widely used in outdoor roofing, paver, and cladding. Size: 300*200mm, 400*250mm, 500*250mm, 600*300mm Thickness: 6mm, 8mm, 10mm or as per client's requirement Packing: Wooden crate Optional color: Black, green, blue and rusty yellow.