Customized zirconia button for ceramic watch Fine polished surface, mirror or diamond grade.Made with super fine disperse zirconiapowderhigh precision in toleranceExcellet mechanical Streghth:This zirconiashellhas super hardness and good toughnessStrong wearing resistance, acid and alkali resistance,durable lifeGood replacekment for metalshell of wrist watchFor small quantity, we can make them by machining without molds. short lead time.