Certified Terahertz Ore 2mm Cut Beads Eyeglass Chain & Necklace Far infrared rays and Terahertz waves. 2mm cut bead Terahertz ore eyeglass chain and necklace. Beautifully sparkling. You can also use it as a necklace by connecting the lobster clasp with an adjuster. Eyeglass chain length: Approximately 66cm. Necklace length: Approximately 62cm + 5cm The appraisal certificate in the image is for confirmation only, and we do not provide copies. The silicone rubber is black, but if you wish to change it to white, please be sure to let us know first. For an additional 200 yen, we can put it in a box for a gift. When attaching the silicone rubber to the frame, slightly shift the center metal fitting to create some space and insert it. If you force the rubber in while rolling it, the rubber may be damaged and break. Do not use it in places where it is likely to get wet, such as bathing, saunas, or swimming pools. We offer three types of Terahertz ore eyeglass chains: 2mm cut beads, 3mm cut beads, and station chains. #chibinyaneyeglasschain We apologize, but please refrain from price negotiations. m(_ _)m