... (ndfeb) Grade:N48 Coating:Nickel magnetization:according to you needs loudspeaker magnet mainly comprised of neodymium ,iron and boron,is the ... properties of high remanence,coercivity,and Max.energy product. sintered loudspeaker magnet grade:N35,N38,N40,N42,N45,N48,N50,N52 ... mg/cm2 you are welcome to enquiry on our sintered loudspeaker magnet