... of high remanence,coercivity,and Max.energy product. neodymium ring magnetic grade:N35,N38,N40,N42,N45,N48,N50,N52 ... ,N33AH,N35AH(Max.operational temperature:up to 230c) neodymium ring magnetic Outsanding product:1)high performance:N52,N48M,48SH,42UH ... average low weight loss less than 2 mg/cm2 neodymium ring magnetic applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics, ...