ESPEARL is ball-shaped artificial sand made of Alumina, and can be repeatedly reused since it has better hardiness and durability compared to silica sand. For this reason, ESPEARL benefits not only the foundry industry, but also contributes to the preservation of natural sand resources in rapidly growing countries. Since ESPEARL has higher thermal conductivity and excellent chilling characteristics than other products, it can be used as a substitute for Zircon and Chromite.