... tray, boiler, bottles, bottle cap, filters,etcOptical& watch makeroptical lens, eyeglass, sunglass, metal, gold, jewelry, diamond, watch band ... and other parts of the parts of the lens by ultrasonic cleaning ,etc.all the world the ... by inkpad of buildup,commonly used WELGO special cleaner can guarantee clear and smooth.if combined with ... circuit boards,parts used. mini ultrasonic cleaner for finger nail