Aluminum Oxide (Al2O3) ceramic is an excellent electrical insulator and is one of the most widely used advanced ceramic materials. In addition, it is extremely resistant to wear and corrosion, and is an industrial ceramic that can only be formed by diamond grinding. Product Details: Material: Aluminum Oxide. Function: Insulator device ceramic. Type: Ceramic. Color: White. Can be Customized: Yes, please provide drawings of specific products.