About C.G. Conn 88HY The story of the C.G. Conn 88H trombone ultimately begins in 1875 with the vision and determination of one man: Colonel C.G. Conn. Founding a band instrument manufacturing company in the small town of Elkhart, Indiana, C.G. Conn quickly became known for his innovative brass designs and became the largest producer of trombones in the United States and earned the lasting reputation as "America's trombone house." Carrying on this tradition, the 88H is recognized for its unique tone color and refusal to "break up" even at the most extreme dynamics making it one of the most widely used professional symphonic trombones in the world. The C.G. Conn 88H series. Trombones with a future as bright as their past. The C.G. Conn 88HY Symphony trombone features a .547" primary bore combined with a .562" bore traditional wrap F attachment that offers outstanding clarity and projection. The chrome plated nickel silver inner handslide tubes provide the ideal surface for smooth and quick handslide action. The yellow brass material used in the professional bell produces a rich yet lively sound with a quick response. The clear lacquer finish adds a subtle warmth overall. The C.G. Conn 88HY professional trombone is ideal for both symphonic and solo performance.