rare earth magnetic material Product details:♥material:neodymium-iron-boron♥Temperature:the max operation temp is up to 200 degree centigrade or 380 curie temperature♥Grade:N35,N38,N40,N42,N45,N48,N50(M,H,SH,UH,EH) ♥Shape:ring,block,disc,bar,and so on♥Size:according to customers'..