Holton Revelation 52 Tuba Mouthpiece Tag #: M201411 Length Inner Rim Diameter Throat Diameter Cup Depth Shank End Diameter 3.850″ 1.330″ .358″ 1.71″ .528″ Comments: “FRANK HOLTON & CO. ELKHORN, WIS. / Revelation / 52” text on side. Share this:TwitterFacebookLike this:Like Loading...