YAMAHA-Mouthpiece Trombone Heavy 51-GP

YAMAHA-Mouthpiece Trombone Heavy 51-GP, large shank, rim inner diameter Ø 25.23, cup volume & shape: standardw, rim contour: standard, throat: 6.92mm, backbore: semi-broad, relatively large inner rim diameter with large cup volume for a dark sound,standard euphonium model with a large backbore. GP Series has been created especially for professionals who require superior quality from their mouthpiece. The GP Series features an innovative shape and extra-heavy gold-plate finish for players who prefer a focused, concentrated tonal core.