100H Series Trombone Brass and saxophone players the world over know and respect the name C.G. Conn. Come discover the new age of Conn, from UMI. In recording studios, on the concert hall stage, in private teaching studios, C.G.Conn instruments are there, all across the world. Why? Because of the tremendous response, excellent projection and superb balance offered by Conn instrumentsC.G. Conn - where the future is as bright as the past. Conn Trombone 100H has a 500" (12.70mm) bore, 7-3/8" (187mm) yellow brass bell, 3 interchangeable mouthpipes, lightweight slide, lacquer finish, woodshell case. Ideal for lead or solo performance.