Conn 112H Double Rotor Bass TromboneThe Conn 112H inline independent double rotor bass trombone in the key of Bb F Gb features an 10" professional rose brass bell producing a warm, rich sound. The . 562" large bore combined with the open wrap F Gb attachments offers outstanding clarity and projection with less resistance. The chrome plated nickel silver inner handslide tubes provide the ideal surface for smooth and quick handslide action. The clear lacquer finish adds a subtle warmth to