Manufacturer's Description:
Schilke tuba mouthpieces are specially designed for BBb, CC, Eb and F Tubas and Sousaphones which require a standard (large) shank tuba mouthpiece. Models 66, 67, and S-H feature the classic Helleberg shaped cup.
69C4: 32.76mm, 1.290 inch cup diameter; M throat. With a very comfortable rim and cup that is not too deep, the 69C4 offers an excellent characteristic sound and facilitates all registers of the instrument.
