New, Unused. 6mm, inner diameter 14cm. Purchased from a reliable natural stone wholesaler. I also use Terahertz and have personally experienced its amazing effects, such as relief from stiff shoulders! Individual results may vary, but I highly recommend it. Offered at a low price, so no price reduction is possible. Will be shipped in simple packaging. Effects: The cell activation and blood circulation-promoting effects of Terahertz waves can significantly improve our health. Furthermore, it can be expected to have a relaxing effect and reduce stress mentally, making it an ideal item for balancing the mind and body. Terahertz is said to emit Terahertz waves that cause approximately 1 trillion molecular vibrations per second. It is believed to have effects such as improved blood flow, cell activation, and metabolism promotion. Up to 5 bracelets can be shipped together. If you wish to combine shipping, please contact me through the combined shipping request. Discounts are available for combined shipping. 2 items combined: 100 yen off 3 items combined: 200 yen off 4 or more items combined: Discount up to 300 yen, so please request a price change. Please note that we cannot approve requests with incorrect amounts. The item will be thoroughly purified and shipped in simple packaging. Thank you.