1.Industrial Alumina Ceramic 9-Hole Tube has high hardness and temperature resistance 2.Industrial Alumina Ceramic 9-Hole Tube exhibit extraordinary mechanical strength, ensuring their durability and reliability even under extreme conditions. 3.Industrial Alumina Ceramic 9-Hole Tube have good electrical insulation and ion conductivity. 4.The optical properties of Industrial Alumina Ceramic 9-Hole Tube make it very suitable for high-precision optical equipment.