AMM's NdFeB permanent magnets are divided into four types: Sintered anisotropic NdFeB magnets Sintered isotropic NdFeB magnets Compression molding epoxy bonded NdFeB magnets Injection molding plastic bonded NdFeB magnets The magnetic properties of isotropic sintered fully dense NdFeB magnets are much better than that of isotropic bonded NdFeB magnets. AMM is only manufacturer to supply isotropic sintered fully dense NdFeB magnets with super-high performance. The isotropic NdFeB magnets can be used as multipole ring.