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