... Neodymium-Iron-BoronTemperatureThe max operation temp is up to 220 degrees Celsuis or 380 curie ... white-blue Zn, Epoxy, Gold, and etc.High Magnetic PerformanceHigh magnetic performanceApplication Sensors, motors, rotors, wind turbines,wind generators ... , speakers,loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on.CertificateISO9001: 2008 ...