1.coating:ni,Zn,gold.etc 2.strong magnetic force 3.shape:ring , ... a subsequent assembly is not easy craze.characteristic:A.coating:ni,Zn,gold.etcB.strong magnetic forceC.shape:ring ,block,bar ... Coefficient (°C)360360360360320320360360360320320Curie Temperature (°C)130130130130160160 arc sintered neodymium coat Ni magnet manufacture