Yamaha YBL-835 Bass TromboneThis professional bass trombone has an open playing feel, has a rich sound, authoritative tone that responds ideally to player control. The hand rest is detachable, it has a gold brass tuning slide, a new rotor shape and a new mouthpiece receiver. Slide Receiver Previous models included an internal protrusion in the slide receiver that was designed to provide optimum playing resistance and consistent tone. The YBL 835 does away with this design