Made of quality brass the SL48 trombone mouthpiece is highly regarded among beginning and professional musicians alike. The result of a special approach to design and manufacture, the SL48 trombone mouthpiece delivers the performance and comfort required where they are needed most: where instrument meets musician. The mouthpiece production techniques used by Yamaha promises consistent quality time after time. Our computer-aided design system and computer controlled lathe work together to produce the most precise, consistent mouthpieces in the world. The SL48 trombone mouthpiece features a well-balance rim and cup for all-around playing. The refined design meets the needs of professional players.