The C.G. Conn 88HO Symphony trombone features a .547″ primary bore combined with a .562″ bore open wrap F attachment that offers outstanding clarity and projection with an open feel. The chrome plated nickel silver inner handslide tubes provide the ideal surface for smooth and quick handslide action. The rose brass material used in the professional bell and handslide material produces a deep, warm resonant sound while the clear lacquer finish adds a subtle warmth overall. The C.G. Conn 88HO professional trombone is ideal for both symphonic and solo performance.