CG Conn Bass TromboneThe Conn 110H single rotor bass trombone features a . 562" bore combined with an open wrap F attachment that offers outstanding clarity and projection with an open feel. The 10" rose brass professional bell produces a deep, warm resonant sound. 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 overall. The Conn 110H professional bass