... Nickel shape:block,segment size:according to your need Permanent Neo Magnetic mainly comprised of neodymium ,iron and boron,is ... )N30AH,N33AH,N35AH(Max.operational temperature:up to 230c) Neo Magnetic Outsanding product:1)high performance:N52,N48M,48SH,42UH ... low weight loss less than 2 mg/cm2 Neodyium Permanent Neo Magnetic applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics, ...