Alessi-Vacchiano trumpet mutes are unsurpassed for tonal quality and acoustically built to play in tune. Each mute, made under rigid production standards, is designed to respond instantly in all registers; produce a clear mute sound at any volume; and provide uniform, accurate intonation. Features: Acoustically built to play in tune Mutes are unsurpassed for tonal quality that's readily heard Produces a clear mute sound at any volume