4°C ring, Christmas limited edition, 2019. It was a pair ring, but the design is stylish, so it can be used as a single ring. Purchased at the end of 2019, worn about 3 times, and is in beautiful condition with no scratches. It's a limited edition item and sold out quickly, so it's no longer available for purchase. It's estimated to be worth around 20,000 yen. I think it has the quality and shine of a 30,000-40,000 yen item. Thank you for looking.