The manufacturer and model recognized best musicians and teachers around the world and all generations. Great sound. Tuning slide moves well, never clings, chromium is not erased, the compression is excellent. Quartostile runs briskly, not jammed. All crowns are good. Attachment is not required. Served Ivkina on Mayakovskaya (the Best master in Russia). Comes in solid case (for safe transportation). There is no mouthpiece. Free worldwide shipping. If you prefer another shipping method - ready to discuss, write. If you have any questions, don't hesitate to ask. More information, photos, videos, etc. Thanks for watching. Have a good day! ;-)