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By certification 
1) 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,30UH-38UH and 30EH-35EH;
4) Shape: ring,block,disc,bar and so on;
5) Size: according to customers' request;
6) Coating: Ni, Zn, gold, copper, epoxy and so on;
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,30UH-38UH and 30EH-35EH;
4) Shape: ring,block,disc,bar and so on;
5) Size: according to customers' request;
6) Coating: Ni, Zn, gold, copper, epoxy and so on;
