... .Certification: ISO9001:2008 2.High quality,Competitive price 3.Shape: block Block Magnets. 1. Materials: Neodymium-Iron-Boron;2. Technology: Utilizes new ... : High coercive force, the max operation temp is up to 200 degree centigrade or 380 curie temperature; 4. Grades: N33-N52 ... , loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on. Block shape NdFeb permanent magnet