... -Iron-Boron.2. Temperature: the max operation temp is up to 200 degree centigrade or 380 curie temperature.3. Grade:N33 ... ,Disc,Cylinder,Rod,Bae,Cube,Sphere,Strip,etc.5. Size: According to customers' request.6. Coating: Ni, Zn, NiCuNi,gold, copper, epoxy and so ... ).2.The maximum service temperature of magnet is changeable due to the ratio of length and diameter, coating and environmental factors ...