The Main 42T trombone is suitable for both beginning and advanced trombonists. The 42T student has an open wrap. Thismeans that the tube portion of the valve is made into an oval. This way the air can flow freely through the valve and the tube, which is very important for the air. This Main 42T trombone also has a quarter valve and frontrecommend the player with more experience. A quarter valve extends the range of the trombone to the low register.