Materials - We use Cem-Fil Glass Fiber. Cem-Fil is a worldwide leader in the production of glass fiber; based in Spain. We also use low alkali cement and multiple correlation materials and additives. 2.Unique Benefits:① Beautiful and Lifelike -- Our products are molded based on natural stones and sculptures, designed by a professional sculptor. We use accurate spraying and production techniques, to ensure that the surface, shape, and colors of our products are very lifelike. ② Custom-Modeling -- The nature of our material is such that it can be modeled and formed to any shape or architectural specification.③ Durability-- All products will last at least 50 years and can last much longer.④ Strength - Though extremely lightweight, the products are very strong. With typical product thickness between 6 - 15 mm, our products can withstand forces up to 15 - 30 kg/m².⑤ Resistant to Fire and Water -- Our products carry a limited lifetime warranty against corrosion, rotting, or abnormal weathering due to the elements.