Haag Brass - BossBone - Tenor Trombone Options:BossBone w/ Screw Bell the insert is more delicate

the insert is more delicate than traditional O-ring based products

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Cup Description: C shaped cup with a medium diameter slightly larger than the 12

Haag Brass - BossBone - Tenor Trombone Options:BossBone w/ Screw Bell the insert is more delicateThe BossBone is equipped with a Bosc valve, a rotary valve with an open passage and only 80 rotation. This valve was developed and invented by Cristian Bosc in 2011, HAAG Brass was the first company to install this valve in trombones at all. The HAAG BossBones can be individually adapted and built to your needs. Tuning: Bb F Bore: 13. 9mm . 547 Valve : Bosc Rotary Valve Thumb Lever: German or Americanstyle Bell : 220mm 8. 661 Bell: German or