Capillary tubes are needed for many applications in liquid measurement, liquid transfer, flow restrictors, fibre optic components, laser technology, x-ray diffraction analysis and thermocouple assemblies. Goodfellow’s new line of high-precision glass capillary tubes are available with inner diameters as small as 0.005 mm and in a range of materials including soda lime glass, borosilicate glass, quartz and sapphire. These materials can be sterilized, are inert and are suitable for precision measuring. Tube shapes can be matched to the application and include circular, rectangular, square, heavy wall, double bore, four bore and multibore. Goodfellow