The Bach LT39G Stradivarius Alto Trombone is one of the best instruments available today. It features a .468-inch bore and a lightweight nickel outer handslide for quick response. The LT39G also features a 6.5" one-piece, hand-hammered gold brass bell for superior projection and a rich, warm sound. Well in tune with a beautiful singing sound, it comes in the key of Eb. Includes a case and mouthpiece.