Thank you for viewing. This is a Goros fine angle chain. It is a genuine product that I purchased myself at Goros around 2012 or 2013. After that, it was a little long, so I cut the length of the chain myself. Therefore, I am selling it as a "defective item" because I thought there might be a need for the chain only. If you already have one, how about it for an extension custom? Chain length Approximately 44.2cm including the marukan (circular clasp) at both ends. Regarding Goros, there are no guarantee cards or certificates, so if you have any concerns, please refrain from purchasing to avoid trouble for both of us, and purchase it yourself at Goros. Also, I cannot answer any further questions regarding authenticity or the purchase process, so please understand. Regarding the "safe appraisal" service, I have not set it up because I have cut the length and I understand that it may not meet the criteria. *Since I have used it myself, there are inevitably small scratches from use and reassembly, so please purchase it if you understand that it is a used item. Returns after purchase are not accepted.