※ Please do not comment before purchasing, such as "Can I buy this at ○○cm?" If you are purchasing a single item, please buy it without commenting. We often miss comments, and many people only comment and don't buy. Please understand. However, please be sure to inform us of the length after your purchase. This is a chain necklace made of surgical stainless steel. The deformed ball chain alternates between barrel-shaped bars and balls, making it a more accented necklace compared to a regular ball chain. Because the bar and ball parts are linked (BAR x ROUND), it is named the BR chain. The clasp of this chain is a connector type that fits the ball into a cylindrical clasp, making it durable and less likely to break, easy to thread pendants through, the clasp doesn't interfere with the design, and the length can be adjusted by cutting it with nippers, etc. It is a very user-friendly necklace with excellent features. It is medical-grade stainless steel that minimizes allergic reactions and is gentle on the body. This material is recommended for those who cannot use silver accessories due to metal allergies. Since it is a metal that is unlikely to discolor, it does not require maintenance such as polishing, and you can enjoy it very easily. ※ In rare cases, it may not suit your skin, so please stop using it immediately if this happens. This product allows you to freely choose the length up to 90cm. We accept orders in 1cm increments, so please specify your desired length when you win the auction. ※ However, please note that there may be slight variations. Please note that we do not accept width specifications, as the width is only as stated. Thank you for your understanding. ■ Width and thickness of the chain: Approximately 4.0mm wide x 4.0mm thick ■ Material (including clasp): Medical-grade surgical stainless steel, which is resistant to metal allergies