Neodymium ring magnets are being designed into a new generation of motors, generators, hydraulic cylinders, pumps & sensors. Our strong ring neodymium magnets N35, N38, N40, N42, N45, N50 and N52 are in many sizes. When we call ring magnet, tube magnet, or maybe permanent magnets rare earth strong ring neodymium magnets, they are very similar, 1