AR Resonance First Aid Euphonium Brass Silver; (17mm) tone stabilizer; suitable for Euphon...(+)
AR Resonance First Aid Euphonium Brass Silver; (17mm) tone stabilizer; suitable for Euphonium and Trombone; corrects the intonation of the instrument and improves the response; faster and more precise articulation; more consistent and resonant sound; material: brass, silver-plated