SLIDE TONE / COPPER BRASS / 10mm for French Horn NachtmusiK BRASS FACTORY original, handmade acoustic adjustment ring for trumpets. Mainly provides changes to the acoustics and playing feel. Increases resonance, allowing the sound to carry to the back of the hall. Improves the instrument's response, allowing for fine control. Improves the feel of high notes, and is effective in expanding the range and reducing misnotes. This is not a "mouthpiece ring" that fits on the mouthpiece, but a new type of acoustic adjustment ring that is attached to the slide parts of the main tube, etc. Used by Emmanuel Urso, principal solo horn player of the Milan Scala Orchestra. A message from Mr. Urso is published 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. In a customer survey, 95% of customers responded that they felt a change. For more information, please visit https://nachtmusik.theshop.jp/ *Please understand that the effects may vary from person to person due to the nature of the product.