Conn Standard Tuba Mouthpiece Tag #: M201438 Length Inner Rim Diameter Throat Diameter Cup Depth Shank End Diameter 3.435″ 1.190″ .341″ 1.01″ .498″ Comments: “CONN – STANDARD″ text on side. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading...