... when heated above zero.Our main products are: 1,Metal injection molding, made from the stainless steel, tungsten, Iron-base alloy ... steel, hard metal alloy. 2,Rare earth magnet, including sintered Neodymium-Iron-Boron, bonded Neodymium-Iron-Boron, sintered Samarium-Cobalt. All magnets ... be preferred).2.Purchasing quantity .3.Materials and other requirements. injection molded ferrite magnet ring