Our high-precision glass beads are usually made of soda glass or borosilicate glass, but on request we can also supply quartz glass, sapphire glass or optical glasses. The standard tolerance is ± 0,02 mm. Without surcharge, the surfaces can be supplied matt or polished. You need even higher precision? No problem: We can also supply customized glass beads with tolerances of ± 0,01 and ± 0,005 mm.