Features include a 11" (279mm) bell, .468" (11.89mm) bore, a 19¾" (502mm) length, a weight of 4 lbs. 5 oz. (1.65kg), an 11 French horn mouthpiece and a heavy duty travel case. The instrument comes in a lacquer or silver finish. The Bb French Horn uses a large 11" bell that provides a rich,powerful sound in the middle range of marching music. This Bb horn, played like the Bb side of a double horn is perfect for today’s marching ensemble.