Item Management Number: 9101 Magnetic Necklace, Silver, with TDK engraving. - Engraving: TDK - Length: Approximately 69cm, quite long. - Flat measurement: Approximately 34cm "Magnetic Necklace" for stiff shoulders 【Effectiveness】 Stiffness and blood circulation There is no noticeable rust, but it is a used item, so please understand. It still has shine and strong magnetism, so it sticks. As this is a purchased item, we do not know further details. Please refrain from purchasing if you have any concerns. We cannot accept returns or refunds after purchase. Please review the images carefully before purchasing. Thank you for viewing.