Classified by materials, plate can be grouped intoAlumina-Carbon(Al2O3-C)、Alumina-Zirconir-Carbon(Al2O3-ZrO2-C) and Zirconir(ZrO2). The Alumina-Zirconir-Carbon (Al2O3-ZrO2-C)series possesses Strong strengh, good thernal shock,good capacity of erosion resistance to molten steel and it can be used for many times. The plate surface is flat and with accurate size. It can be applied in various steel.