By using precise pressure control and high-purity fused quartz, high-precision capillary fibers can be prepared, achieving internal apertures at the micro/nano level (300 nanometers to 100 micrometers). The discrepancies between its inner and outer diameters are minimal, ensuring accurate measurement and control of liquids and gases in the fields of technology, medicine, industry, and fiber optic sensing. Quartz capillaries are widely used in separation science, including gas chromatography, capillary liquid chromatography, and capillary electrophoresis, and other popular fields.