Thermal : even under severe high temperature conditions, alumina ceramic tubes will not undergo thermal expansion or thermal cracking, ensuring the long-term stable functioning of the equipment Material: Alumina tube is made of AL, O, ZrO2 as the main material, with high melting point and excellent high hardness. High insulation performance, high to electrical insulation, safer to use Stable electrical properties: under high voltage environment, the electrical properties of alumina ceramic tubes remain stable and will not be degraded due to prolonged use, ensuring the long-term reliability of the equipment Low Coefficient of Thermal Expansion: Alumina ceramic tubes have a low coefficient of thermal expansion, even in environments with large temperature variations, there is no stress due to thermal expansion Premium ceramic tube, excellent high-temperature, electrical insulation. Ideal for thermocouple, furnace, heating elements and various industrial equipment applications