... (ndfeb) Coating:Nickel shape:block,segment size:according to your need Permanent Magnetic mainly comprised of neodymium ,iron and boron, ... of high remanence,coercivity,and Max.energy product. Permanent Magnetic grade:N35,N38,N40,N42,N45,N48,N50,N52 ... low weight loss less than 2 mg/cm2 Neodyium Permanent Magnetic applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics,communication ...