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.