... ring,block,tile, size:according to your n neodymium rare earth magnets mainly comprised of neodymium ,iron and boron,is ... ,N35AH(Max.operational temperature:up to 230c) neodymium rare earth magnets Outsanding product:1)high performance:N52,N48M,48SH,42UH ... low weight loss less than 2 mg/cm2 neodymium rare earth magnets applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics, ...