Material: Zirconium Oxide （ZrO2） Specification: ф0.5mm～ф30mm Precision: G3～G20 Application: ①High-speed high-precision bearing rolling element; ②Bicycle, ball of slide plate; ③Ball pen stem;　　 ④Various kinds of instruments, meters and gauge pins. The ceramic balls is searched by the first-class inquiry institutions of the state and has reached the international leading level of similar products. In addition, they have been recognized by clients in Japan, Korea and Europe and tried small quantities of supply. We supply domestic bearing manufacturers in large quantities.