This is ring radial-poles magnet assembly. It have solved the anisotropic magnets cannot magnetized to radial-poles problem. This assembly have achieved the product’s inner diameter are the same poles, the outer diameter are the same poles. Also this radial-poles is permanently, it cannot changed with the time goes by. If you are interested in this product, please kindly send your request, we are able to produce the assembly for you completely according to your request.