Features The Bach model 16 features a 7-1/2" one-piece hand-hammered bell designed for excellent resonance and projection. The .459"/.509" dual bore handslide design provides balanced and agile response. The clear lacquer finish provides a subtle warmth to the overall sound. The Bach Stradivarius model 16 tenor trombone is designed for the player looking for a high performance straight trombone. Description Product Description The 16 Series features a medium bore to allow even more options on sound color and versatility. Equally at home in the symphony or the jazz ensemble with a light but powerful sound that will carry over the rest of the ensemble when needed.