Product Description This is a ring from **Martin & MacArthur**, a high-end, long-established brand in Hawaii. The design is simple yet powerful, featuring two luxurious rows of Hawaii's rare and sacred **"Koa Wood"**. The beauty of the wood grain stands out, giving a warm feeling. The base material is tungsten, which is very hard, scratch-resistant, and maintains a mirror-like shine. 【Special Discount for Combined Purchase】 If you purchase this ring together with another ring currently listed (with abalone shell), we will offer a 1,000 yen discount on the total amount! If you wish to take advantage of this, please use the combined purchase function or let us know in the comment section before purchasing. 【Product Details】 Brand: Martin & MacArthur Materials: Koa Wood, Tungsten Size: Size 21 (actual measurement with a ring gauge. See photo 13) Accessories: Dedicated brand logo box 【Condition】 This is a used item, but it is in beautiful condition with no noticeable scratches. Tungsten is a very durable material, so you can continue to enjoy it for a long time. *Please check the condition in the photos. Recommended for those who like Hawaiian jewelry and accessories incorporating natural materials. #HawaiianJewelry #KoaWood #MartinMacArthur #MartinMacArthur #Tungsten #Ring #Men'sRing