Like the 13A4a, this is an ideal mouthpiece for lead playing. Has an extra tight "Z" backbore creates an ideal lead mouthpiece with quick response and more resistance than standard model.
• 16.76mm cup diameter. • Shallow "A" cup • Semi-flat #4 rim • Extra tight "z" backbore. • Silver plated
California Residents Only: WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov