The entire surface of this item is made of high-grade metal germanium (black) using the latest IP technology. Since the entire surface is germanium, it is expected to have a significant effect on the skin. * Please do not wear the necklace while bathing or showering. The entire surface is germanium, which is a semiconductor, so it should not cause metal allergies. However, please discontinue use if it does not agree with your skin. Length: 46cm I purchased this but have never used it, so it is new and unused. Retail Price: ¥10,000 #Germanium #ShoulderStiffness #HealthGoods #ImprovedCirculation - Design: Chain necklace - Accessories: Dedicated box - Instruction manual: With instruction manual Thank you for viewing.