The Conn 88HCL Symphony trombone features a .547″ primary bore combined with a .562″ bore F attachment that offers outstanding clarity and projection with an open feel. The open wrap F attachment features the patented “CL2000” valve designed by renowned solo trombone artist Christian Lindberg. The unique design is extremely efficient, smooth, and quick and removes any resistance normally found in a traditional rotor valve. It also boasts the shortest “throw” of any trombone on the market today providing the quickest transition to the F side of the trombone. 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 Conn 88HCL professional trombone is ideal for both symphonic and solo performance. Available in silver-plate finish as model 88HCLSP.