Willie's Aquarius Series Rim Satin Gold Mouthpiece supervised by Hiroyuki Odatomo Aquarius (Initial Model) This mouthpiece solves the problem of difficult breath entry in the mid-low range, which is common with 6 1/2 size mouthpieces, while also achieving a high range. The previous owner has coated the rim with a very fine, micro-particle gold satin. I feel that it doesn't slip even with sweat, making it easy to maintain the aperture. It has been re-plated about twice, and there are some scratches commensurate with the years of use, but there are no problems with its use. Please understand that this is a used item. It costs over 50,000 yen when purchased new, so the price is set considering the condition. It will be shipped via Yamato's Compact service. Thank you.