1mm Inner diameter single bore aluminia Aluminous porcelain ceramic tube.Materials: Alumina Oxide Ceramics (Al2O3)Size: 1mm inner diameter, 3mm outside diameter, 10mm overall lengthShape: Single bore pipeVoltage insulation: 1000VMaximum temperature resistance: 1600 degree in Celsius/2912 degree in fahrenheitWeight: 71gApplication: electrical heating wires, insulators, high temp protectionPackage Content:500 pcs 1mm Inner Dia. Aluminia Ceramic Pipe