The JP136 alto trombone is the perfect starter for orchestral musicians to start exploring the world of alto trombone playing.Suitable For: The JP136 alto trombone is the perfect starter for orchestral musicians to start exploring the world of alto trombone playing. Some will say that it is the perfect starter model to train players to use all 7 trombone slide positions, although I would suggest talking to a teacher before choosing this as a beginner trombone, due to being in the key of Eb.Unique Benefits: The instrument is easy to manage, reliable and features a 7 bell for greater sound projection. The instrument has also been welcomed by more experienced players looking for an inexpensive alto trombone for occasional performances and gigs.Supplied With: The JP136 Eb Alto Trombone is supplied with a JP601 mouthpiece and lightweight case.