SLIDE TONE / COPPER BRASS / 5mm for French Horn NachtmusiK BRASS FACTORY original, handmade acoustic adjustment ring for trumpets. This primarily changes the acoustics and playing feel. It increases resonance, allowing the sound to carry to the back of the hall. The instrument's response improves, allowing for finer control. The sensation of hitting high notes becomes better, and it is effective in expanding the range and reducing misnotes. This is a new type of acoustic adjustment ring that is not a "mouthpiece ring" that fits on the mouthpiece, but is attached to the slide parts such as the main tube. Used by Emmanuel Urso, principal solo horn player of the Orchestra of the Teatro alla Scala, Milan. We are publishing a message from Mr. Urso on Instagram. https://www.instagram.com/reel/DFK9CM9s1dm/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA== Many accessories are supervised by professionals, but SLIDE TONE is a product that studies the resonance of the material from a scientific perspective, rather than the professional's sense. According to a customer survey, 95% of customers answered that they felt a change. For more details, please visit https://nachtmusik.theshop.jp/ *Please understand that the effects may vary from person to person due to the nature of the product.