I purchased this around September of last year and used it until about a month ago. The Lotus mouthpiece is designed with the following features: * Designed to vibrate efficiently with minimal effort. * Reduces breath loss and maximizes core sound and response. * Designed for a consistent playing feel regardless of range or volume. The 2M model features a "medium cup x balanced backbore" and is suitable for classical, concert band, and all-around use. 【Model Features (2M)】 * Consistent response from mid to high range. * Thick core sound, stable intonation even at forte. * Designed to be not too shallow, allowing for easy low-note production. * Suitable for a wide range of ensembles, from orchestras to concert bands. 【User Experience (Personal Impression)】 The response is very good, and it feels like it produces sound directly in proportion to the breath you put in. I find it easy to control the mid to high range, and I think it's a mouthpiece that's easy to handle in terms of stamina. I am selling it because I have switched to a different model. 【Included Items】 Mouthpiece body, box Instant purchase is welcome. Feel free to ask any questions!