... -45H,30SH-42SH,30UH-40UH and 28EH-35EH;28AH-35AH.4. Shape: Block,Ring,Disc,Cylinder,Rod,Bae,Cube,Sphere,Strip ... . Coating: Ni, Zn, NiCuNi,gold, copper, epoxy and so on.7. Application: Motors, rotors, wind turbines,wind generators, loudspeakers, magnetic hooks ... of length and diameter, coating and environmental factors.3.Density:7.4~7.65g/cm³,Reversible Temperature coefficient αBr-0.09~-0.13 ...