... shape:block,segment size:according to your need Permanent Magnet mainly comprised of neodymium ,iron and boron,is the third generation ... date,It has excellent properties of high remanence,coercivity,and Max.energy product. Permanent Magnet grade:N35,N38,N40,N42, ... average low weight loss less than 2 mg/cm2 Permanent Magnet applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics, ...