... (Max.operational temperature:up to 230c) Permanent Magnet Outsanding product:1)high performance:N52,N48M ... Permanent Magnet applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics,communication equipment,toy,car,servomotor,step motor,DC motor and linear motor ... ,mircrophones Pros: Very strong hold when contacting another magnet or plain ...