I purchased this at the beginning of this year and used it for practice for about four months. There are scratches on the throat area due to rubbing against the instrument body. Yamaha has released a new product for the first time in 10 years, since the BB-Carolino in 2013. This mouthpiece, developed to match the YCB-623S, incorporates the Helberg style, which is a mainstream style in recent years. However, it differs from Helberg in terms of cup depth, rim, and throat, ensuring sufficient resonance while also being less demanding to play than the Schilke Helleberg II or Conn Helleberg, which are representative players in the Helberg family. It is designed to be used comfortably by players of all levels. The rim feels slightly rounded, and the mouthpiece offers a comfortable feel similar to the BB-Carolino. Furthermore, the weight is lighter than the standard model, suggesting that this mouthpiece was planned with considerable enthusiasm. (※Quoted from Tubaman plus) Rim inner diameter: 32.86mm Throat diameter: 8.00mm Cup: Slightly deep V-cup Shank: American I will wash it again before shipping.