Thumb ring (stainless steel) for use with a tuba in St. Petersburg. *This time, we are selling it at an outlet price because there is a part that the manufacturer couldn't make well, but it shouldn't bother the user. This product brings the thumb about 15mm closer to the lever than the genuine ring, making fingering easier by reducing the need to force the thumb to hook on. For those who find it difficult or undesirable to stick a coin on the lever or have a repairman reposition the ring due to cost or appearance, this product is very convenient as it can be used immediately by simply replacing it. This product features a dragon motif design. The dragon motif has the following meanings: The dragon is the god of the earth and water, and its ascent to the heavens symbolizes success and leaps forward. In feng shui, the dragon is a special being and is good luck itself, bringing up all kinds of luck, such as financial luck, business luck, love luck, and health luck. Why not adorn your instrument a little as a good luck charm or accessory? Product Details Ring inner diameter: 35mm, Wire diameter: 6mm Threaded part: M6 x 15 Weight: Approximately 32g (Genuine product: Approximately 27g) Material: Stainless steel Since stainless steel is used, it will not rust or peel. *This product is a handmade item created by us. It may not be suitable for those seeking perfection, but we think it is highly recommended for those who like originality, as it is a unique product.