These dilators are plastic and do not bend. Set of four Neodymium Magnetic Dilators. Once this product has been opened, it cannot be returned. Size 5 Length 5.75 inches Diameter 1.125 inch Circumference 3.53 inches Size 6 Length 6 inches Diameter 1.375 inches Circumference 4.32 inches Size 7 Length 6.5 inches Diameter 1.625 inches Circumference 5.09 inches. What happens when you use a VuVa Neodymium Magnetic Set? Soft tissue lengthens, relaxing muscles and ligaments. As the tissue relaxes, the Neodymium magnets increase blood flow to the area calming nerves and promote relaxation. VuVa are the only patented sets available with Neodymium magnets. Magnetic Therapy is based on the premise that all living organisms exist in a magnetic field, including the human body. The human body generates its own magnetic field. Therefore, the body can heal itself when electromagnetic energy is in balance. The “North Pole” of a Neodymium magnet is often referred to by medical researchers as the “healing side” of the magnet. The Full VuVa Pelvic Support sets contains over sixty strategically positioned Neodymium magnets that allow this field of soothing energy to flow into the body. Iron is a component of our blood content and every ion - or atom - contained in our cells carries oxygen and produces an electrical impulse. These two elements make up our bodies own electrical magnetic field. This means when the negative north side of a magnet is placed next to a tight, painful area, it draws fresh oxygenated blood to the nerves and surrounding muscles. This, in contrast, is a positive energy field. The positive energy field creates two results: as magnets are alkaline, it counteracts any acidity in the body caused by disease and fresh blood helps to remove any acidity from the body which, in turn, accelerates healing and relaxation.