Our VuVa Magnetic Dilators contain Neodymium Magnets that are very costly. A Neodymium Magnet is a widely used type of rare-earth magnet used in medical applications, it is made from an alloy of neodymium, iron and boron to form the Nd2Fe14B tetragonal crystalline structure which is the fundamental base of the magnet. These magnets are positioned by hand in a beneficial patented pattern with the north side facing outward for maximum depth penetration.