D'addario Reserve Mouthpiece for Clarinet

Made of Ebonite
Precision milled for great consistency and similarity between each mouthpiece.
Expertly designed and made in the USA by a team of world-class musicians and engineers.
Available in 440Hz or 442Hz.
Openings for American tuning (440Hz):
X0 - 1.00mm
X5 -1.05mm
X10 - 1.12mm
Openings for European tuning (442Hz):
X10E -1.11mm
X15E - 1.18mm
X25E - 1.25mm