Brand Booster Tuba BBTS-G, Booster for Tuba Mouthpieces, With a sophisticated holding system, which prevents traces and still can be firmly fixed to the mouthpiece, Plastic mouthpieces are as comparable in weight as metal mouthpieces and retain the more comfortable feel on the lips, Suitable for all common metal mouthpieces, The weight on the mouthpiece reduces the vibrations, the tone is more centered and the accuracy increases, Finish: Silver, high-gloss