Description: Shape and Size. Single bore pile, 12mm in length, 8mm inner diameter for the hole, 12mm outside diameter. Made of high grade Al2O3 Alumina Ceramic, which ensures a great mechanical strength and stable performance while working. Resistance on high temperature. Capable of the temp up to 1600 degree in celsius(2912 fahrenheit) 1000V Insulatsion, high corrosion resistance, scratch proof and Good chemical stability. Application. Mainly used in electric heating elements, protection sheaths, insulators. 8mm Inner diameter single bore aluminia Aluminous porcelain ceramic tube. Materials: Alumina Oxide Ceramics (Al2O3) Size: 8mm inner diameter, 12mm outside diameter, 12mm overall length Shape: Single bore pipe Voltage insulation: 1000V Maximum temperature resistance: 1600 degree in Celsius/2912 degree in fahrenheit Application: electrical heating wires, insulators, high temp protection Package Content: 5/10pcs 8mm Inner Dia. Aluminia Ceramic Pipe