... :2000 and ISO 14001:2004 magnet Quick Details Origin: Zhejiang China (Mainland)Brand Name: YILIModel Number: N33-N52,33M-48M,33H-48H ... strongest magnetism,good coercive1) Material: Sintered Neodymium-Iron-Boron;2) Temperature: the max operation temp is up to 200 degree centigrade ... or 380 curie temperature; 3) Grade:N33-N52,33M-48M,33H-48H,30SH-45SH ...