... -base alloy, tool steel, hard metal alloy. 2,Rare earth magnet, including sintered Neodymium-Iron-Boron, bonded Neodymium-Iron-Boron, sintered ... , rings and segments. 3,Ferrite magnet: Hard ferrite magnet and soft ferrite magnet including the MnZn and NiZn. 4,Die-cast component, made from ... .Purchasing quantity .3.Materials and other requirements. injection molded ferrite magnet ring