... Neodymium(ndfeb) Coating:Nickel shape:dics,ring,block,tile, size:according to your need neodymium ring magnetic mainly comprised of neodymium ... ,N35AH(Max.operational temperature:up to 230c) neodymium ring magnetic Outsanding product:1)high performance:N52,N48M,48SH ... low weight loss less than 2 mg/cm2 neodymium ring magnetic applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics ...