Please Note: Shown is the Yamaha SL48L Trombone MouthpieceWell-balanced rim and cup for all-around playing. Refined design meets the needs of professional players. Produced using the most advanced computer design and manufacturing technology, Yamaha's Standard Series mouthpieces feature unmatched precision, smooth attack, secure control, and easy playability. They have the ideal weight for all-around usage and are available in over 100 configurations. There’s a Yamaha mouthpiece to suit every player.