Detailed Product Description Thermostat ceramics:Material: 95% alumina ceramic or steatite ceramicsFeatures: High insulation, high temperature, corrosion resistance, etc.Size: diameter 7.3 millimeters, 5.3 millimeters diameter, height 12.5 mmWe can produce more kinds of ceramic gasket for thermostat,if you have any demand,please send us your details with drawing